{"title":"Exhausts for GMC Sierra","description":"\u003ch2\u003ePerformance Headers and Exhaust Upgrades for GMC Sierra\u003c\/h2\u003e\n\u003cp\u003eFactory exhaust manifolds often warp or crack, causing annoying exhaust ticks, exhaust leaks, and lost power under load. Replacing worn pipes with mandrel-bent tubing, tubular headers, or high-flow catalytic converters eliminates backpressure and restores clean exhaust flow. Coverage spans models from 1986 through 2026, supporting 4.3L, 4.8L, 5.3L, 6.0L, and 6.2L gas engines, 6.6L diesel powerplants, and classic big-block V8s.\u003c\/p\u003e\n\u003cp\u003eWhether replacing rusted tubing or pairing hardware with a \u003ca href=\"\/collections\/gmc-performance-tune\"\u003eperformance tune for GMC\u003c\/a\u003e, these durable \u003ca href=\"\/collections\/gmc-exhausts\"\u003eexhaust components for GMC\u003c\/a\u003e provide solid sealing and long-term reliability under heavy towing.\u003c\/p\u003e\n\u003ch3\u003eWill replacing the exhaust manifold fix ticking noises on my truck?\u003c\/h3\u003e\n\u003cp\u003eYes, warped factory manifolds frequently leak at the cylinder head, creating a distinct ticking sound under acceleration. Installing durable aftermarket headers or replacement manifolds eliminates the leak and quiets engine bay noise.\u003c\/p\u003e\n\u003ch3\u003eAre these exhaust systems direct bolt-on replacements?\u003c\/h3\u003e\n\u003cp\u003eMost kits utilize factory mounting locations and standard flange connections for direct fitment. While cat-back systems and OEM-style converters bolt on directly, specialized long-tube headers or custom turbo piping may require matching connector pipes.\u003c\/p\u003e\n\u003ch3\u003eShould I install aftermarket headers or a cat-back exhaust?\u003c\/h3\u003e\n\u003cp\u003eHeaders replace restrictive exhaust manifolds at the cylinder head to improve exhaust scavenging. In contrast, a cat-back system replaces the tubing and muffler downstream of the converter to minimize backpressure and deepen the exhaust note.\u003c\/p\u003e","products":[{"product_id":"short-exhaust-header-for-chevrolet-silverado-gmc-sierra-1999-2005-with-6-0l-v8-engine","title":"Short Exhaust Header for Chevrolet Silverado\/GMC Sierra (1999-2005) with 6.0L V8 Engine","description":"\u003cp\u003e\u003cem\u003eMaximize your GMT800 truck's performance with these high-flow exhaust headers—engineered for 1999–2005 Silverado and Sierra 6.0L V8 engines to reduce backpressure, increase horsepower and torque, and improve throttle response throughout the powerband.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eFree Up Power Hidden in Your 6.0L V8\u003c\/h2\u003e\n\u003cp\u003eThe 6.0L Vortec engine in your GMT800 Silverado, Sierra, or full-size SUV is a torque monster—known for towing capability and reliable power delivery. But GM's factory cast-iron exhaust manifolds create significant backpressure that robs your engine of performance. Each time a cylinder fires, exhaust gases fight for space in the restrictive factory manifolds, creating interference that limits power output and throttle response.\u003c\/p\u003e\n\u003cp\u003eThese performance exhaust headers solve that problem by giving each cylinder its own dedicated exhaust tube. This design eliminates cylinder interference and dramatically reduces backpressure, allowing exhaust gases to exit quickly and efficiently. The result is noticeable gains in horsepower and torque, improved throttle response, and better engine breathing—especially valuable when towing heavy loads or accelerating onto highways. Combine these headers with a cold air intake and cat-back exhaust system for maximum performance gains.\u003c\/p\u003e\n\u003ch2\u003eKey Features \u0026amp; Performance Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual Exhaust Runners:\u003c\/strong\u003e Each cylinder gets its own dedicated tube, eliminating interference and backpressure created by restrictive factory manifolds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven Power Gains:\u003c\/strong\u003e Reduced exhaust restriction allows your 6.0L V8 to produce more horsepower and torque across the entire RPM range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Engine Efficiency:\u003c\/strong\u003e Better exhaust flow means improved scavenging and combustion efficiency for stronger performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Less backpressure translates to more immediate power delivery when you press the accelerator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Towing Performance:\u003c\/strong\u003e Improved exhaust flow is especially beneficial under load—perfect for hauling and towing applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation for Full Exhaust Build:\u003c\/strong\u003e These headers are the critical first step in a complete high-performance exhaust system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1999–2005 Chevrolet Silverado 1500\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1999–2005 GMC Sierra 1500\/2500\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2000–2004 Chevrolet Suburban 1500\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2000–2004 Chevrolet Tahoe\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2001–2004 GMC Yukon\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2000–2004 GMC Yukon XL 1500\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2002–2005 Chevrolet Avalanche 1500\u003c\/strong\u003e\u003cbr\u003eEngine: 6.0L V8\u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAir Injection System:\u003c\/strong\u003e These headers do not include air injection fittings (AIR system). If your vehicle is equipped with a secondary air injection system, you may need to address this during installation or consider headers designed to retain this feature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional Installation Strongly Recommended:\u003c\/strong\u003e Header installation requires working underneath the vehicle, disconnecting exhaust components, and dealing with rusted or seized hardware. The job typically requires a lift, cutting tools, and welding or fabrication skills to properly connect to your existing exhaust system. Professional installation ensures proper fitment, sealing, and integration with your vehicle's exhaust system.\u003c\/p\u003e\n\u003ch2\u003eWhat Are Exhaust Headers?\u003c\/h2\u003e\n\u003cp\u003eExhaust headers replace your factory cast-iron exhaust manifolds with a tuned tubular design. While factory manifolds merge all exhaust ports into a single shared outlet (creating interference and backpressure), headers give each cylinder its own dedicated tube that merges downstream in a carefully designed collector. This design allows exhaust gases to exit smoothly without fighting each other, dramatically improving flow and reducing the pumping losses that rob your engine of power.\u003c\/p\u003e\n\u003ch2\u003eMaximize Your Performance Build\u003c\/h2\u003e\n\u003cp\u003eFor best results, consider pairing these headers with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Air Intake:\u003c\/strong\u003e Increases airflow into the engine to complement improved exhaust flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCat-Back Exhaust System:\u003c\/strong\u003e Reduces restriction downstream of the catalytic converters for complete exhaust system optimization\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Tune:\u003c\/strong\u003e ECU tuning can optimize fuel delivery and timing to take full advantage of improved airflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen combined, these modifications remove intake and exhaust restrictions, allowing your 6.0L V8 to perform at its full potential with noticeable gains in power, torque, and throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758409007352,"sku":"DS-CHESILGMCSIERR10520","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/chev-silverado1__02438.1601935723.1280.1280.jpg?v=1767728177"},{"product_id":"turbo-manifold-for-chevy-silverado-gmc-sierra-1986-1995-with-366-396-402-427-454-v8-engines","title":"Turbo Manifold for Chevy Silverado\/GMC Sierra (1986-1995) with 366\/396\/402\/427\/454 V8 Engines","description":"\u003cdiv class=\"cold-air-intake-product-description\"\u003e\n\u003ch1\u003ePerformance Headers - Chevy Silverado\/GMC Sierra Big Block V8 (1986-1995)\u003c\/h1\u003e\n\u003cp\u003eUnleash your big block's legendary power with performance headers engineered for 366\/396\/402\/427\/454 V8 engines. Eliminate restrictive factory manifolds and unlock massive horsepower gains by letting each cylinder breathe freely.\u003c\/p\u003e\n\u003ch2\u003eWhy Headers Make a Difference\u003c\/h2\u003e\n\u003cp\u003eHeaders provide each cylinder with its own exhaust pipe, eliminating cylinder interference and backpressure that robs power in factory manifolds. Combined with a cold air intake and cat-back exhaust, headers remove all restrictions—allowing your big block to perform at its full, tire-shredding potential.\u003c\/p\u003e\n\u003ch2\u003eKey Performance Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Power Gains:\u003c\/strong\u003e Eliminate exhaust backpressure for substantial horsepower and torque increases throughout the powerband\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual Cylinder Flow:\u003c\/strong\u003e Each cylinder gets its own exhaust path—no more fighting for exit flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Unrestricted exhaust flow delivers instant power when you stomp the throttle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive Big Block Sound:\u003c\/strong\u003e Deep, commanding V8 roar that announces your truck's presence\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Towing Power:\u003c\/strong\u003e Improved breathing means more pulling capability for heavy loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete System Foundation:\u003c\/strong\u003e Perfect foundation for full performance exhaust upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerfect Fitment\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eChevy Silverado\/GMC Sierra C1500:\u003c\/strong\u003e All trim levels\u003cbr\u003e\u003cstrong\u003eYears:\u003c\/strong\u003e 1986-1995\u003cbr\u003e\u003cstrong\u003eEngines:\u003c\/strong\u003e 366, 396, 402, 427, 454 Big Block V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnleash your big block's fury\u003c\/strong\u003e with headers engineered for maximum performance and power.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758409072888,"sku":"DS-SILVESIERRA10820","price":274.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/Silverado-sierra1__06042.1602168180.1280.1280.jpg?v=1767728184"},{"product_id":"short-exhaust-header-for-chevrolet-silverado-gmc-sierra-1999-2005-with-4-8l-5-3l-v8-engine","title":"Short Exhaust Header for Chevrolet Silverado\/GMC Sierra (1999-2005) with 4.8L 5.3L V8 Engine","description":"\u003cp\u003e\u003cem\u003eUncork the true torque potential of your Gen III LS engine and banish those restrictive, rusty stock manifolds for good.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003ePerformance Shorty Exhaust Headers for 1999-2005 Chevy Silverado\/Tahoe \u0026amp; GMC Sierra\/Yukon (GMT800 4.8L\/5.3L Vortec)\u003c\/h2\u003e\n\u003cp\u003eIf you drive a GMT800 platform truck or SUV, you know the Gen III Vortec V8s (4.8L LR4 and 5.3L LM7) are legendary for longevity, but the factory exhaust holds them back. The stock cast iron \"log\" manifolds are heavy, prone to cracking, and terrible at moving air efficiently above 3,000 RPM. Because the 4.8L and 5.3L share the same block architecture and exhaust port pattern, these headers are a direct bolt-on upgrade for both displacements.\u003c\/p\u003e\n\u003cp\u003eThis system is designed specifically for \"clean\" cylinder heads—meaning trucks \u003cstrong\u003eWITHOUT\u003c\/strong\u003e factory Air Injection (AIR) or EGR ports on the manifolds. By replacing the turbulent factory castings with mandrel-bent tubing, you improve exhaust scavenging significantly. This eliminates the backpressure bottleneck, allowing your V8 to breathe easier, rev faster, and finally produce that signature LS rumble that the factory muffler choked out.\u003c\/p\u003e\n\u003ch2\u003eWhy You Need This Upgrade\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Individual primary tubes prevent exhaust pulses from colliding, eliminating the \"lazy\" pedal feel common with stock manifolds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Scavenging:\u003c\/strong\u003e Unlike factory logs that trap heat and gas, these headers use high-velocity flow to pull exhaust out of the cylinder head, freeing up horsepower.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Seal:\u003c\/strong\u003e Machined flanges provide a flat, tight mating surface to the cylinder head, fixing the notorious \"ticking\" sound caused by warped stock manifolds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe LS Sound:\u003c\/strong\u003e Unlocks the deep, aggressive tone that your V8 was capable of from the factory but was silenced by restrictive casting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse: collapse; border: 1px solid #e0e0e0;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eFitment Era\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e1999-2005 (New Body Style \/ GMT800)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eEngine Platform\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eGen III LS Vortec (4.8L LR4 \/ 5.3L LM7 \/ 5.3L L59)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eEmissions Note\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eFits models \u003cstrong\u003eWITHOUT\u003c\/strong\u003e Air Injection\/EGR ports only.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eInstallation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eBolt-On Replacement (Uses factory collector location)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation \u0026amp; Fitment Notes\u003c\/h3\u003e\n\u003cp\u003eThis is a direct replacement for the stock manifolds on 2WD and 4WD models. \u003cstrong\u003eCrucial Check:\u003c\/strong\u003e Pop your hood before ordering and inspect your stock exhaust manifolds; if you see metal tubes (smog equipment) connecting to the top of your manifolds, these headers will \u003cstrong\u003eNOT\u003c\/strong\u003e fit. These are designed strictly for trucks without Air Injection systems. We highly recommend soaking your factory manifold bolts in penetrating oil 24 hours prior to installation to prevent snapping bolts in the aluminum heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGive your Silverado or Sierra the airflow it deserves and wake up that V8 today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758444855544,"sku":"DS-HEADERSV8-4-8-5-3","price":224.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/headers2__13889.1649261676.1280.1280.jpg?v=1769487691"},{"product_id":"long-exhaust-header-for-chevrolet-silverado-gmc-sierra-2014-2018-4-8l-6-2l-v8-engine","title":"Long Exhaust Header for Chevrolet Silverado\/GMC Sierra (2014-2018) 4.8L\/6.2L V8 Engine","description":"\u003cp\u003e\u003cem\u003eYour 6.2L V8 is essentially a Corvette engine trapped in a truck body—it's time to remove the restrictive factory shackles and let it run free with the airflow it demands.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003ePerformance Long Tube Headers \u0026amp; Y-Pipe for Chevy, GMC \u0026amp; Cadillac (4.8L \/ 6.2L V8)\u003c\/h2\u003e\n\u003cp\u003eIf you are driving a 2014-2018 GM truck or SUV equipped with the powerhouse 6.2L V8 (L86) or the fleet-spec 4.8L, you are sitting on massive potential. However, the factory exhaust system is designed for silence and emissions compliance, not performance. The stock cast iron manifolds are narrow and convoluted, trapping heat and creating significant backpressure. This Long Tube Header kit is the sledgehammer solution to that restriction.\u003c\/p\u003e\n\u003cp\u003eThis system features a massive 2.0-inch primary tube diameter. In the world of LS\/LT performance, that is serious volume. These large-diameter runners are designed to support high horsepower builds, supercharged applications, or simply to maximize the top-end pull of the 6.2L engine. By pairing these headers with the included Y-pipe, you create a high-velocity exhaust path that scavenges cylinders efficiently. This 8-2-1 design (8 cylinders to 2 collectors to 1 merge) ensures that exhaust pulses exit smoothly, resulting in a dramatic increase in torque and a thunderous exhaust note.\u003c\/p\u003e\n\u003cp\u003eConstructed from CNC-machined T-304 stainless steel, this kit is built to survive the harsh environment of the undercarriage. The computerized TIG welds ensure structural integrity at the flanges, preventing the warping and leaks common with lesser quality headers. \u003cstrong\u003eCritical Fitment Note:\u003c\/strong\u003e This kit is engineered specifically for the 4.8L and 6.2L deck heights and exhaust ports. It will \u003cstrong\u003eNOT\u003c\/strong\u003e fit the 5.3L engine options. Please verify your engine displacement before ordering.\u003c\/p\u003e\n\u003ch2\u003eWhy You Need This Upgrade\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Airflow Potential:\u003c\/strong\u003e Huge 2.0\" (50.8mm) primary tubes are sized for maximum peak horsepower and aggressive builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Exhaust Overhaul:\u003c\/strong\u003e Includes a matching Y-pipe to connect the long tube headers to your existing exhaust system seamlessly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Durability:\u003c\/strong\u003e Made from T-304 Stainless Steel to resist corrosion and withstand high exhaust gas temperatures (EGTs).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Engineering:\u003c\/strong\u003e CNC machined flanges and computerized TIG welding ensure a flat seal against the head to prevent exhaust ticks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bolt-On:\u003c\/strong\u003e Utilizes pre-welded hangers for factory fitment points (though professional installation is recommended).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFitment\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e2014-2018 GM Trucks\/SUVs (See List)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eEngine Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e4.8L and 6.2L ONLY (NO 5.3L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003ePrimary \/ Outlet\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e2.0\" Inlet \/ 3.0\" Outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eT-304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eLong tube headers are a significant modification. Due to tight clearances in the engine bay of 2WD and 4WD K2XX platform trucks, professional installation is highly recommended. This kit does not include installation guides. \u003cstrong\u003eImportant:\u003c\/strong\u003e Because this system alters the position of the catalytic converters (or removes them depending on your setup), a custom ECU tune is strongly advised to prevent Check Engine Lights and to optimize fuel trim for the increased airflow.\u003c\/p\u003e\n\u003ch3\u003eReplaces These OEM Applications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFits 4.8L \/ 6.2L Engines ONLY. Does NOT fit 5.3L Engines.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCadillac Escalade 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eChevy Silverado 1500\/2500\/3500 2014, 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eChevy Suburban 1500\/2500 2014, 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eChevy Tahoe 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eGMC Sierra 1500 2014, 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eGMC Yukon 2015, 2016, 2017, 2018 2WD\/4WD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUnleash the beast hiding in your engine bay—upgrade to High-Flow Long Tube Headers today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758449541368,"sku":"DS-HEADERSV820142017","price":349.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/header1__40003.1660074760.1280.1280.jpg?v=1770069490"},{"product_id":"long-exhaust-header-for-chevrolet-silverado-gmc-sierra-2007-2013-with-4-8l-5-3l-6-0l-v8-engine","title":"Long Exhaust Header for Chevrolet Silverado\/GMC Sierra (2007-2013) 2WD 4.8L 5.3L 6.0L V8 Engine","description":"\u003cp\u003e\u003cem\u003e\u003cspan\u003e\u003cstrong\u003eNot for 4WD\/AWD\/4X4\u003c\/strong\u003e vehicles\u003c\/span\u003eFix the dreaded \"manifold tick\" permanently and unlock the airflow potential of your Gen IV Vortec V8 with these high-flow stainless steel headers.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003ePerformance Stainless Steel Exhaust Headers for Chevy, GMC \u0026amp; Cadillac (GMT900 4.8L\/5.3L\/6.0L\/6.2L)\u003c\/h2\u003e\n\u003cp\u003eIf you drive a GMT900 platform truck or SUV (Silverado, Sierra, Tahoe, Escalade), you are likely familiar with the weak link in an otherwise bulletproof powertrain: the exhaust manifolds. The factory cast iron manifolds are notorious for retaining heat, warping, and snapping cylinder head bolts, leading to that annoying ticking sound on cold starts. Furthermore, their restrictive \"log\" design creates substantial backpressure, forcing your LS-based engine to fight against itself to expel exhaust gases, which robs you of torque and horsepower.\u003c\/p\u003e\n\u003cp\u003eThis stainless steel header kit is the ultimate solution. Featuring an 8-into-2 piping design, these headers provide each cylinder with its own 1.75-inch primary tube. This separation prevents exhaust pulses from interfering with one another, a phenomenon known as scavenging. By smoothing out the flow and reducing backpressure, these headers allow your 4.8L, 5.3L, 6.0L, or 6.2L engine to breathe freely. The result is a noticeable improvement in throttle response, mid-range towing power, and top-end performance.\u003c\/p\u003e\n\u003cp\u003eConstructed with CNC-machined 7\/16\" thick head flanges and heavy-duty TIG\/MIG welds, these headers are built to withstand the thermal expansion and contraction that destroys stock components. The 3-stage polished finish not only looks incredible under the hood but also adds a layer of corrosion resistance. Whether you are replacing broken stock parts or building a performance truck, these headers provide the airflow foundation your V8 needs.\u003c\/p\u003e\n\u003ch2\u003eWhy You Need This Upgrade\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminate Manifold Ticking:\u003c\/strong\u003e Replaces warp-prone cast iron manifolds and prevents future exhaust leaks caused by broken bolts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Scavenging:\u003c\/strong\u003e 1.75\" primary tubes reduce backpressure, allowing the engine to clear cylinders faster for a fresh fuel\/air charge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Flanges:\u003c\/strong\u003e Thick 7\/16\" CNC machined head flanges ensure a flat, leak-free seal against the cylinder head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Stainless steel construction with TIG and MIG welding offers superior longevity compared to rusting factory iron.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Outlet:\u003c\/strong\u003e Large 3.00\" collectors allow for maximum exhaust volume, creating a deeper, more aggressive engine note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable style=\"border-collapse: collapse; border: 1px solid #e0e0e0; margin-bottom: 20px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFitment\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e2007-2014 GM Trucks \u0026amp; SUVs (GMT900)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eEngine Family\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eGen IV Vortec V8 (4.8L \/ 5.3L \/ 6.0L \/ 6.2L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eTube Specs\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e1.75\" Primaries \/ 3.00\" Outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFlange Thickness\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e7\/16\" (Head) \/ 3\/8\" (Outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eProfessional installation is highly recommended. Working on exhaust systems on trucks of this age often involves dealing with seized or broken cylinder head bolts. This kit includes the headers and gaskets only; no instructions are provided. Please refer to a factory service manual for torque specifications and removal procedures. The kit features 2 O2 sensor locations.\u003c\/p\u003e\n\u003ch3\u003eReplaces These OEM Applications (2 Wheel Drive Only Models!)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCadillac Escalade 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (6.2L)\u003c\/li\u003e\n\u003cli\u003eChevy Silverado 1500\/2500\/3500 2007, 2008, 2009, 2010, 2011, 2012, 2013 (4.8L, 5.3L, 6.0L)\u003c\/li\u003e\n\u003cli\u003eChevy Suburban 1500\/2500 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (5.3L, 6.0L)\u003c\/li\u003e\n\u003cli\u003eChevy Tahoe 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (4.8L, 5.3L)\u003c\/li\u003e\n\u003cli\u003eGMC Sierra 1500 2007, 2008, 2009, 2010, 2011, 2012, 2013 (4.8L, 5.3L, 6.0L, 6.2L)\u003c\/li\u003e\n\u003cli\u003eGMC Yukon 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (4.8L, 5.3L, 6.0L, 6.2L)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eStop letting your engine struggle against restrictive exhaust logs—upgrade to High-Flow Headers and feel the difference.\u003c\/strong\u003e\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758450524408,"sku":"DS-HEADERS0703-GMC-CHEVY","price":289.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/Headers543__52733.1665680018.1280.1280.jpg?v=1767729335"},{"product_id":"long-exhaust-header-for-gmc-sierra-2014-2018-with-5-3l-6-2l-v8-engine","title":"Long Exhaust Header For GMC Sierra (2014-2018) with 5.3L 6.2L V8 Engine","description":"\u003cp\u003e\u003cem\u003eUncork the massive potential of your GM V8 truck and eliminate the flow restriction of the factory log manifolds with this high-flow long tube header and Y-pipe system.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eStainless Steel Long Tube Headers \u0026amp; Y-Pipe for Cadillac, Chevy, \u0026amp; GMC Trucks (1-7\/8\" Primaries)\u003c\/h2\u003e\n\u003cp\u003eIf you are driving a modern GM truck or SUV—whether it’s the workhorse Silverado\/Sierra or the luxury Escalade\/Yukon—you are sitting behind a potent V8 engine that is desperately trying to exhale. From the factory, these trucks come equipped with cast iron \"log\" manifolds designed for quiet operation and rapid manufacturing, not performance. These stock manifolds trap heat, create backpressure, and force your engine to work harder to push exhaust gases out. This stainless steel header package is the ultimate solution to let your LS or LT-based engine breathe freely.\u003c\/p\u003e\n\u003cp\u003eFeaturing massive 1.875\" (1-7\/8\") primary tubes, this kit is sized perfectly for the 5.3L and 6.2L V8s. Unlike smaller 1-5\/8\" headers that can choke top-end power, the 1-7\/8\" diameter allows for maximum scavenging at high RPMs without sacrificing low-end torque. This is critical for getting heavy trucks moving or towing loads. The included Y-Pipe connects the headers to your exhaust system, ensuring a smooth, laminar flow from the cylinder heads all the way back.\u003c\/p\u003e\n\u003cp\u003eDurability is key when upgrading exhaust components on a truck. Constructed from stainless steel with substantial 7\/16\" head flanges, these headers are built to resist warping—a common issue with thinner, cheaper alternatives. The flattening process on the flanges ensures a tight seal against the cylinder head, preventing those annoying exhaust ticks. Whether you are chasing more horsepower on the dyno, a louder, chop-heavy idle, or simply replacing cracked manifolds, this kit delivers the performance and sound your truck deserves.\u003c\/p\u003e\n\u003ch2\u003eWhy You Need This Upgrade\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Flow:\u003c\/strong\u003e Large 1.875\" (1-7\/8\") primary tubes reduce backpressure, allowing the engine to scavenge exhaust gases efficiently for big power gains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Solution:\u003c\/strong\u003e Includes a matching Y-Pipe to bridge the headers to your exhaust system, eliminating the need for expensive custom fabrication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Seal:\u003c\/strong\u003e Heavy-duty 7\/16\" thick head flanges and 3\/8\" outlet flanges prevent warping and gasket blowouts under high heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive Sound:\u003c\/strong\u003e dramatically changes the tone of your V8, turning the muffled stock whisper into a deep, aggressive American V8 roar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Durability:\u003c\/strong\u003e Stainless steel construction withstands the elements and high exhaust temperatures far better than mild steel or cast iron.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFitment\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eSelect 2007-2017 GM Trucks (See List Below)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003ePrimary Tube Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e1.875\" (1-7\/8 inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFlange Thickness\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e7\/16\" (Head) \/ 3\/8\" (Outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional Installation Recommended:\u003c\/strong\u003e Installing long tube headers on 4WD\/AWD trucks can be a tight fit, often requiring manipulation around the steering shaft and front driveshaft. No instructions are included in the box. This kit includes the necessary gaskets, exhaust clamps, and head bolts. \u003cstrong\u003eNote:\u003c\/strong\u003e Due to the change in catalytic converter location and oxygen sensor placement, a professional ECU tune is highly recommended after installation to maximize power gains and manage check engine lights.\u003c\/p\u003e\n\u003ch3\u003eReplaces These OEM Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCadillac Escalade 2015, 2016, 2017 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eChevy Silverado 1500\/2500\/3500 2014, 2015, 2016, 2017 2WD\/4WD (except 2014 Chevrolet Silverado 1500 LT Crew Cab Pickup 4-Door 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated)\u003c\/li\u003e\n\u003cli\u003eChevy Suburban 1500\/2500 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eChevy Tahoe 2015, 2016, 2017 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eGMC Sierra 1500 2014, 2015, 2016, 2017 2WD\/4WD\u003c\/li\u003e\n\u003cli\u003eGMC Yukon 2015, 2016, 2017 2WD\/4WD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eExclusions:\u003c\/strong\u003e Exclude Mid-Year Change 2018.5+ New Body Style\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransform your truck from a restricted daily driver into a high-performance machine—order your Stainless Header and Y-Pipe Kit today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758456094968,"sku":"DS-HED-SILSIE-02","price":379.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/h1__12104.1679026590.1280.1280.jpg?v=1767729548"},{"product_id":"exhaust-pipe-for-chevrolet-silverado-gmc-sierra-2001-2016-6-6l-lb7-lly-lbz-lmm-lml","title":"Exhaust Pipe for Chevrolet Silverado GMC Sierra (2001-2016) 6.6L LB7 LLY LBZ LMM LML","description":"\u003ch2\u003eHeavy-Duty Stainless Exhaust Up-Pipe for 2001-2016 GMC Sierra \u0026amp; Chevrolet Silverado (Duramax\/GMT800-K2XX)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis passenger-side exhaust up-pipe replaces the restrictive and fracture-prone factory unit to optimize exhaust flow, reduce backpressure, and improve turbocharger spool-up on Duramax engines.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado \u0026amp; Sierra Thermal Fatigue Failure\u003c\/h3\u003e\n\u003cp\u003eThe OEM passenger-side up-pipe on the 6.6L Duramax is a known weak link, constructed from thin-walled steel that is highly susceptible to thermal fatigue. Through thousands of heat cycles, the factory bellows and flange welds often develop stress fractures, leading to significant exhaust leaks before the turbocharger. These leaks result in a loss of drive pressure, which manifests as sluggish throttle response, increased Exhaust Gas Temperatures (EGTs), and a noticeable drop in boost pressure. Furthermore, the internal diameter of the stock pipe is often compromised by restrictive bends that create turbulence, hindering the thermal efficiency required for heavy-duty towing.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to withstand the extreme heat of high-output diesel applications, this up-pipe is fabricated from mandrel-bent T-304 stainless steel. Unlike the factory unit, the 2.0-inch diameter through-bore provides a smooth, unobstructed path for spent gasses, significantly increasing velocity to the turbine housing. The T-304 alloy offers superior resistance to oxidation and corrosion, ensuring the pipe will not scale or thin out over time. The assembly features reinforced 3-bolt flanges and heavy-duty bellows designed to absorb the engine's natural vibrations and torque-induced movement without cracking. This bolt-on upgrade restores lost power, lowers EGTs, and provides the structural integrity needed for tuned or hard-working trucks.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2001-2016 GMC Sierra \/ Chevrolet Silverado 2500HD\/3500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDuramax 6.6L (LB7, LLY, LBZ, LMM, LML) \/ GMT800, GMT900, GMTK2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e300-397 hp \/ 520-765 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eUL184AU052PS2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eT-304 Full Stainless Steel \/ Chrome Polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2001-2016 Chevrolet Silverado 2500HD \/ 3500HD (6.6L Duramax)\u003c\/li\u003e\n\u003cli\u003e2001-2016 GMC Sierra 2500HD \/ 3500HD (6.6L Duramax)\u003c\/li\u003e\n\u003cli\u003eEngine Codes: LB7, LLY, LBZ, LMM, LML\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Duramax Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eThese trucks are purpose-built for high-torque hauling and demanding job sites. Upgrading to a T-304 stainless up-pipe ensures your 6.6L powerplant maintains consistent boost pressure and long-term reliability. By eliminating the risk of exhaust leaks, you protect your turbocharger and ensure your rig is always ready for the next heavy load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47997034889464,"sku":"DS-ETEEKUAFA","price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-pipe-for-chevrolet-silverado-gmc-sierra-2001-2016-6-6l-lb7-lly-lbz-lmm-lml-1.webp?v=1771279258"},{"product_id":"exhaust-muffler-pipes-for-chevrolet-silverado-gmc-sierra-2011-2015-6-6l-engine","title":"Exhaust Muffler Pipes for Chevrolet Silverado GMC Sierra (2011-2015) 6.6L Engine","description":"\u003ch2\u003eHigh-Flow SUS409 Exhaust Muffler Pipe Kit for 2011-2015 Chevrolet Silverado, GMC Sierra \u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This heavy-duty exhaust component replaces restrictive factory mid-sections to optimize exhaust flow, reduce backpressure, and lower EGTs in 6.6L Duramax diesel applications.\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado, Sierra LML Restriction\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust system on the 2011-2015 LML Duramax is often the primary bottleneck for thermal management. OEM piping typically utilizes aluminized steel or low-grade stainless that is prone to surface scaling and internal corrosion over repeated heat cycles. Mechanically, the stock configuration creates significant backpressure due to restrictive geometry and muffled transitions. This restriction forces the Variable Geometry Turbo (VGT) to work harder to evacuate spent gases, leading to higher Exhaust Gas Temperatures (EGTs) and reduced efficiency during heavy-duty towing or high-torque hauling cycles.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis kit is engineered from high-quality SUS409 steel, a titanium-stabilized ferritic stainless steel specifically chosen for its superior resistance to atmospheric corrosion and thermal fatigue. With a 2mm wall thickness, these pipes maintain structural integrity under extreme vibration and heat. The transition from 3.5 to 4.0 inches facilitates a rapid expansion of exhaust gases, significantly improving scavenging and reducing parasitic loss. Designed as a direct bolt-on fitment, the kit utilizes a robust 2-bolt connection type to ensure a leak-free seal without the need for custom fabrication or specialized welding on the GMT900 or K2XX chassis.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2011-2015 Chevrolet, GMC Silverado, Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eLML Duramax \/ GMT900 \u0026amp; K2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e397 hp \/ 765 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eUL1063UB39TS18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSUS409 Stainless Steel (2mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2011-2015 Chevrolet Silverado 2500HD\/3500HD 6.6L Duramax\u003c\/li\u003e\n\u003cli\u003e2011-2015 GMC Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet, BMC Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the rigors of heavy-duty diesel work, this SUS409 system is designed to withstand the harsh environments typical of 2500HD and 3500HD trucks. Whether you are managing a fleet or hauling fifth-wheels, this upgrade ensures your 6.6L Duramax breathes efficiently, maintaining long-term reliability and consistent power delivery under maximum load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47999023874296,"sku":"DS-E2K63T7P6","price":269.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-muffler-pipes-for-chevrolet-silverado-gmc-sierra-2011-2015-6-6l-engine-1.webp?v=1771352986"},{"product_id":"exhaust-headers-for-chevrolet-silverado-gmc-sierra-2001-2016-6-6l-engine","title":"Exhaust Headers for Chevrolet Silverado GMC Sierra (2001-2016) 6.6L Engine","description":"\u003ch2\u003eHigh-Flow Stainless Steel Exhaust Manifolds for 2001-2016 GMC, Sierra, Silverado (Duramax LB7-LML \/ GMT800-K2XX)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e These heavy-duty stainless steel manifolds replace the restrictive, narrow factory units to optimize exhaust flow, reduce backpressure, and significantly lower exhaust gas temperatures (EGTs) on Duramax diesel engines.\u003c\/p\u003e\n\u003ch3\u003eThe Stock Sierra, Silverado Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust manifolds on the 6.6L Duramax platform—specifically the driver-side unit—feature a significant \"pinch\" or indentation designed solely to provide clearance for the steering shaft. This structural compromise creates a massive flow restriction, leading to uneven thermal loading between cylinder banks and increased backpressure that fights the turbocharger. Over time, the OEM cast iron material is highly susceptible to heat-cycling fatigue, resulting in hairline fractures, warped mounting surfaces, and persistent exhaust leaks. These leaks degrade turbo spool-up time and reduce fuel efficiency, especially under the high-load conditions seen in heavy towing or commercial use.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered from high-grade stainless steel, these manifolds utilize a high-flow internal geometry that eliminates the restrictive factory indentations without compromising steering shaft clearance. The stainless steel construction offers superior thermal stability compared to brittle cast iron, resisting the warping and cracking common in heavy towing applications. By increasing the internal volume and smoothing the transition to the up-pipes, these manifolds improve exhaust velocity and overall turbocharger efficiency. The increased wall thickness helps retain heat within the manifold to improve kinetic energy for the turbo while preventing engine bay heat soak. The kit includes reinforced gaskets to ensure a gas-tight seal, preventing the pressure loss associated with OEM failures.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2001-2016 GMC, Chevrolet Silverado 2500HD\/3500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDuramax LB7, LLY, LBZ, LMM, LML \/ GMT800, GMT900, K2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e300-397 hp \/ 520-765 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2001-2016 Chevrolet Silverado 2500HD (6.6L V8 Duramax)\u003c\/li\u003e\n\u003cli\u003e2001-2016 Chevrolet Silverado 3500HD (6.6L V8 Duramax)\u003c\/li\u003e\n\u003cli\u003e2001-2016 GMC Sierra 2500HD (6.6L V8 Duramax)\u003c\/li\u003e\n\u003cli\u003e2001-2016 GMC Sierra 3500HD (6.6L V8 Duramax)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe GMC, Chevrolet Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eWhen your Sierra or Silverado is tasked with heavy-duty towing and hauling, exhaust integrity is paramount. These stainless steel manifolds are built for maximum durability and thermal efficiency, ensuring your Duramax maintains consistent boost pressure and cooler operating temperatures under the most demanding workloads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48001984102648,"sku":"DS-EL10978HY","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-for-chevrolet-silverado-gmc-sierra-2001-2016-6-6l-engine-1.webp?v=1771441574"},{"product_id":"exhaust-headers-y-pipe-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l","title":"Exhaust Headers Y-Pipe for Chevrolet Silverado GMC Sierra (2007-2013) 4.8L 5.3L 6.0L","description":"\u003ch2\u003eHigh-Flow Long Tube Exhaust Headers with Y-Pipe for 2007-2013 Silverado, Sierra (GMT900 \/ Gen IV LS)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Replaces the restrictive factory cast-iron exhaust manifolds and pinched Y-pipe with high-flow T-304 stainless steel long tubes to optimize exhaust scavenging and significantly reduce backpressure.\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado, Sierra Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust manifolds on the GMT900 platform are a primary performance bottleneck for the Gen IV LS engine family. These stock components utilize thick, unequal-length cast iron runners with rough internal surfaces that severely impede exhaust gas velocity and increase parasitic backpressure. This restriction causes excessive heat soak in the cylinder heads and prevents the engine from clearing exhaust gases efficiently, particularly at higher RPMs or under heavy load. Furthermore, the OEM Y-pipe often features crush-bent tubing that reduces the effective diameter at every bend, disrupting the laminar flow required for optimal volumetric efficiency and torque production.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis header system is engineered from mandrel-bent T-304 stainless steel to provide a smooth, consistent path for exhaust gases. Featuring 1.75-inch primary tubes and a 2.4-inch outlet, the 8-2-1 design is specifically tuned to harness the kinetic energy of exhaust pulses, creating a scavenging effect that pulls spent gases from the combustion chamber more effectively than stock. The CNC-machined 7\/16-inch head flanges and 3\/8-inch outlet flanges offer a heavy-duty, warp-resistant sealing surface capable of withstanding extreme thermal cycling without leaking. Every joint is TIG-welded for maximum structural integrity, while the 3-stage polished finish provides superior corrosion resistance against road salt and moisture. The inclusion of three O2 sensor locations ensures the PCM receives the necessary feedback for accurate fuel trimming.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2007-2013 Silverado, Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eGen IV LS (4.8L, 5.3L, 6.0L) \/ GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e285-367 hp \/ 295-375 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2004-2013 Chevrolet Silverado 1500\u003c\/li\u003e\n\u003cli\u003e2005-2007 Chevrolet Silverado 1500 HD\u003c\/li\u003e\n\u003cli\u003e2005-2013 GMC Sierra 1500\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet, GMC Professional Grade Build\u003c\/h3\u003e\n\u003cp\u003eEngineered for the rigors of heavy towing and high-torque applications, these headers provide the durability required for work-ready trucks. By reducing EGTs (Exhaust Gas Temperatures) and improving flow, this system enhances long-term engine health while providing the aggressive LS growl and power increase that standard manifolds cannot deliver.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48003487105272,"sku":"DS-EGIC2CZ89","price":359.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-y-pipe-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l-1.webp?v=1771530925"},{"product_id":"catback-exhaust-muffler-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l","title":"Catback Exhaust Muffler for Chevy Silverado GMC Sierra 1500 (2007-2013) 4.8L 5.3L 6.0L","description":"\u003ch2\u003eHigh-Flow T304 Catback Exhaust System for 2007-2013 Chevrolet, GMC Silverado, Sierra (Vortec \/ GMT900)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This T304 stainless steel catback system replaces the restrictive factory piping and baffled muffler to reduce exhaust backpressure and optimize gas scavenging for improved thermal efficiency.\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado\/Sierra Exhaust Limitation\u003c\/h3\u003e\n\u003cp\u003eThe OEM exhaust system on the GMT900 platform is engineered for silence rather than volumetric efficiency. Factory units typically utilize 2.5-inch aluminized steel piping featuring restrictive crush-bends, which reduce the internal diameter at every curve, creating significant turbulence and parasitic drag. Furthermore, the stock heavy-chambered muffler relies on internal baffles and resonators that trap heat and create excessive backpressure. This bottleneck prevents the Vortec 4.8L, 5.3L, and 6.0L engines from effectively evacuating spent combustion gases, resulting in higher EGTs (Exhaust Gas Temperatures) and a noticeable loss in low-end torque and high-RPM horsepower.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis performance catback system utilizes high-grade T304 stainless steel, providing superior resistance to oxidation and corrosion compared to aluminized alternatives. The 3-inch OD main piping is manufactured using computerized mandrel-bending, ensuring a constant diameter throughout the entire flow path to maintain high exhaust gas velocity. TIG welding at the CNC-machined flanges ensures structural integrity under high-pressure cycles and vibration. By implementing a high-flow straight-through muffler design, the system reduces backpressure by up to 40%, allowing for a faster turbo-like spool in naturally aspirated airflow. This results in dyno-proven gains of 15 to 25 horsepower while delivering a deep, aggressive tone without the rasp associated with thinner-walled systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2007-2013 Silverado, Sierra 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eVortec (4.8L, 5.3L, 6.0L) \/ GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e285-367 hp \/ 295-375 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003e\u003cstrong\u003eSHORT BED ONLY\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2007-2013 Chevrolet Silverado 1500 Crew Cab \u003cstrong\u003eShort Bed\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e2007-2013 Chevrolet Silverado 1500 Extended Cab \u003cstrong\u003eShort Bed\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e2007-2013 GMC Sierra 1500 Crew Cab \u003cstrong\u003eShort Bed\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e2007-2013 GMC Sierra 1500 Extended Cab \u003cstrong\u003eShort\u003c\/strong\u003e \u003cstrong\u003eBed\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits models with 143.5 in. wheelbase only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet, GMC Truck Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the rigors of heavy-duty use, this system is designed to handle the increased thermal loads associated with towing and hauling. The heavy-gauge 304 stainless steel construction ensures long-term durability in harsh environments, maintaining exhaust velocity and structural sound quality over thousands of heat cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48003492413688,"sku":"DS-ELDEBLHJE","price":269.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catback-exhaust-muffler-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l-1.jpg?v=1771530176"},{"product_id":"exhaust-retro-kit-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l","title":"Exhaust Retro Kit for Chevrolet Silverado GMC Sierra (2007-2013) 4.8L 5.3L 6.0L Engines","description":"\u003ch2\u003eMandrel-Bent Dual Exhaust Retro Kit for 2007-2013 Silverado, Sierra (Vortec \/ GMT900)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis retro kit converts the restrictive factory single-exit exhaust into a high-flow dual-rear exit system to reduce backpressure and improve exhaust scavenging for GMT900-platform trucks. \u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003eFabrication maybe required. Not Plug and Play.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado, Sierra Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe OEM exhaust on 2007-2013 Silverado and Sierra models utilizes a high-volume, single-inlet muffler and standard crush-bent tubing that creates significant internal turbulence. These factory systems prioritize extreme noise suppression over volumetric efficiency, leading to excessive heat retention and parasitic power loss. The stock crimps at the bends significantly restrict exhaust gas velocity, preventing the Gen IV Vortec engines from breathing effectively, particularly during high-load towing or wide-open throttle acceleration. This restriction forces the engine to work harder to expel spent gasses, negatively impacting both thermal management and fuel economy.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis retro kit utilizes 2.5-inch aluminized steel piping featuring precision mandrel bends, which maintain a constant internal diameter throughout every curve to eliminate flow bottlenecks and maintain high gas velocity. By transitioning from a 3-inch Y-pipe inlet to dual 2.5-inch outlets, the system provides a significant increase in flow capacity and allows for more efficient thermal dissipation. The aluminized coating offers enhanced durability and corrosion resistance against road debris and moisture. Engineered for versatility, the system features slip-together connections and multi-depth rubber-insulated hangers to ensure a secure, vibration-dampened fit that maintains clearance for OEM receiver hitches and full-sized spare tires.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2007-2013 Chevrolet Silverado, GMC Sierra 1500\/2500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eVortec V8 (LY2, LMG, LC9, L96) \/ GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e285-367 hp \/ 295-380 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDS-\u003cspan\u003eUKTPKWT\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2007-2013 Chevrolet Silverado 1500 (4.8L, 5.3L, 6.0L Gas)\u003c\/li\u003e\n\u003cli\u003e2007-2013 GMC Sierra 1500 (4.8L, 5.3L, 6.0L Gas)\u003c\/li\u003e\n\u003cli\u003eFits all wheel-base applications\u003c\/li\u003e\n\u003cli\u003eFits factory single-inlet muffler applications only\u003c\/li\u003e\n\u003cli\u003eMuffler shop required!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet, GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the rigors of the GMT900 chassis, this system is engineered to withstand the thermal stresses of heavy towing and off-road vibration. It provides a robust mechanical upgrade for owners seeking to optimize the gas-flow dynamics of their Vortec power plant while maintaining the utility of the rear frame-rail area.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48003547627768,"sku":"DS-ELFH7W1SZ","price":279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-retro-kit-for-chevrolet-silverado-gmc-sierra-2007-2013-4-8l-5-3l-6-0l-1.webp?v=1771524741"},{"product_id":"exhaust-headers-for-chevrolet-silverado-gmc-sierra-2003-2006-6-0l","title":"Exhaust Headers for Chevrolet Silverado GMC Sierra (2003-2006) 6.0L","description":"\u003ch2\u003eHigh-Flow Shorty Exhaust Headers for 2003-2006 Silverado \u0026amp; Sierra (LQ4\/LQ9 \/ GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho is it for:\u003c\/strong\u003e Designed as a direct bolt-on replacement for restrictive factory exhaust manifolds, these short-tube headers optimize exhaust scavenging to increase low-to-mid-range torque and horsepower without altering the factory catalytic converter placement.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado \u0026amp; Sierra Exhaust Manifold Flaw\u003c\/h3\u003e\n\u003cp\u003eThe factory cast-iron exhaust manifolds on GMT800 trucks equipped with the 6.0L Vortec (LQ4\/LQ9) engines are notorious for two major flaws: thermal cracking and severe airflow restriction. Over repeated heat cycles, especially during heavy towing or hauling, the rigid cast iron expands and contracts unevenly. This leads to sheared manifold bolts and cracked castings that cause annoying exhaust leaks, diminished engine efficiency, and inaccurate O2 sensor readings. Furthermore, the OEM log-style design forces exhaust gases from adjacent cylinders to collide, creating excessive backpressure that chokes low-end torque and starves the engine of top-end power.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese shorty-style headers eliminate OEM cast-iron bottlenecks by utilizing fully mandrel-bent 1-3\/4-inch primary tubes that merge efficiently into a 2-1\/2-inch collector. This smooth tubular design actively scavenges exhaust pulses, pulling spent gases from the cylinders faster to improve volumetric efficiency and throttle response. Constructed from durable 16-gauge (1.5mm) mild steel, the headers are secured by robust, laser-cut 3\/8-inch (9.5mm) thick steel head flanges. These flanges are flattened via hydraulic press to ensure a rigid, warp-resistant, and leak-free seal against the cylinder head. The joints feature TIG brass-style welds to prevent stress fractures under heavy load. Finished with a high-temperature black powder-coated ceramic finish capable of withstanding up to 1700 ℃, these headers dramatically reduce under-hood heat soak while providing superior corrosion resistance against harsh elements.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2003-2006 Chevrolet Silverado, GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eLQ4, LQ9 (6.0L V8) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e300-345 hp \/ 360-380 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2006 Chevrolet Silverado 1500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 Chevrolet Silverado 1500 HD (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 Chevrolet Silverado 2500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 Chevrolet Silverado 2500 HD (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 Chevrolet Silverado 3500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 1500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 1500 HD (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 2500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 2500 HD (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 3500 (6.0L V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMT800 Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for heavy-duty truck applications, these short-tube headers are built to withstand the rigorous demands of payload hauling and continuous towing. By significantly dropping exhaust gas temperatures and fortifying the flange integrity, this upgrade delivers reliable, leak-free pulling power for your Vortec-powered workhorse.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48115971096824,"sku":"DS-E3A207I9C","price":314.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-for-chevrolet-silverado-gmc-sierra-2003-2006-6-0l-1.webp?v=1773878497"},{"product_id":"turbo-exhaust-pipe-for-chevy-silverado-gmc-sierra-2017-2026-6-6l-duramax","title":"Turbo Exhaust Pipe for Chevy Silverado GMC Sierra (2017-2026) 6.6L Duramax","description":"\u003ch2\u003eHigh-Flow Turbo Exhaust Pipe for 2017-2026 Chevrolet Silverado, GMC Sierra (L5P Duramax \/ K2XX \u0026amp; T1XX)\u003c\/h2\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eReplaces the restrictive factory turbo exhaust pipe to reduce exhaust backpressure, significantly lowering exhaust gas temperatures (EGTs) and improving spool times for the 6.6L L5P Duramax.\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Stock L5P Duramax Thermal Bottleneck\u003c\/h3\u003e\n  \u003cp\u003eThe OEM cast and crush-bent turbo exhaust pipes on the GM Heavy Duty platform are notorious for restricting airflow immediately post-turbo. This creates excessive exhaust backpressure, elevating Exhaust Gas Temperatures (EGTs) under heavy towing conditions. The factory thermal management shielding often degrades over multiple intense heat cycles, leading to localized heat soak against the firewall, accelerated wear on surrounding engine bay components, and delayed turbocharger response during heavy throttle applications on long, demanding grades.\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n  \u003cp\u003eThis upgraded turbo exhaust pipe is constructed from premium 304 stainless steel, utilizing precision mandrel-bent geometry to maximize exhaust scavenging and eliminate turbulence directly out of the turbine housing. TIG-welded flanges ensure a structurally robust, leak-free seal that will not warp under extreme thermal stress. By incorporating a high-temperature woven titanium heat sleeve, the unit actively suppresses radiant engine bay temperatures, protecting sensitive electronics while maintaining internal exhaust gas velocity. Retaining the factory M14-1.5 sensor port guarantees seamless integration with OEM emissions equipment without triggering check engine lights.\u003c\/p\u003e\n  \n  \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2017-2026 Chevrolet Silverado, GMC Sierra 2500\/3500\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e6.6L L5P Duramax \/ K2XX \u0026amp; T1XX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e445-470 hp \/ 910-975 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n \n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e2017-2026 Chevrolet Silverado 2500 6.6L L5P Duramax\u003c\/li\u003e\n    \u003cli\u003e2017-2026 Chevrolet Silverado 3500 6.6L L5P Duramax\u003c\/li\u003e\n    \u003cli\u003e2017-2026 GMC Sierra 2500 6.6L L5P Duramax\u003c\/li\u003e\n    \u003cli\u003e2017-2026 GMC Sierra 3500 6.6L L5P Duramax\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eThe GM HD Towing Standard\u003c\/h3\u003e\n  \u003cp\u003eWhen towing 20,000+ lbs, superior thermal management and optimized exhaust velocity are critical. This 304 stainless steel exhaust component ensures your L5P Duramax maintains maximum turbo efficiency and cooler EGTs on the steepest inclines, ensuring reliable cross-country hauling without the risk of thermal throttling.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48118578184440,"sku":"DS-E8F09URU9","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/turbo-exhaust-pipe-for-chevy-silverado-gmc-sierra-2017-2026-6-6l-duramax-1.webp?v=1773953739"},{"product_id":"exhaust-y-pipe-for-gmc-sierra-1999-2006","title":"Exhaust Y-Pipe for GMC Sierra (1999-2006)","description":"\u003ch2\u003eHigh-Flow Exhaust Y-Pipe for 1999-2006 GMC Sierra (Gen III Vortec \/ GMT800)\u003c\/h2\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eReplaces the restrictive factory Y-pipe to eliminate exhaust bottlenecks, reduce backpressure, and improve exhaust scavenging for better throttle response and increased horsepower.\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Stock Sierra Exhaust Bottleneck\u003c\/h3\u003e\n  \u003cp\u003eThe factory GMT800 exhaust system, particularly the OEM Y-pipe, features crushed bends and narrow piping diameters designed primarily for mass production cost savings and noise suppression. These restrictive crush bends cause severe turbulence and exhaust gas stagnation. When the 4.8L, 5.3L, or 6.0L Vortec engines attempt to expel spent combustion gases under heavy load or towing conditions, this bottleneck creates excessive backpressure. This built-up backpressure leads to heat soak in the exhaust manifolds, significantly dampening throttle response, limiting high-RPM horsepower, and muting the natural aggressive exhaust note characteristic of the LS-based V8.\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n  \u003cp\u003eUpgrading to this direct bolt-on stainless steel Y-pipe resolves the factory flow restrictions through optimized airflow dynamics. Constructed from corrosion-resistant stainless steel, this Y-pipe utilizes smooth, mandrel-bent transitions that maintain a constant diameter through every curve, maximizing exhaust gas velocity and scavenging efficiency. By streamlining the exhaust path, it immediately reduces backpressure and localized thermal loads. The system features four precision-welded O2 sensor bungs matching the stock locations to ensure accurate fuel trim readings without triggering check engine lights. A heavy-duty stainless steel band clamp provides a leak-free, high-tension seal. This bolt-on enhancement unlocks more horsepower, boosts low-end torque for towing, improves fuel economy, and restores the deep, resonant V8 exhaust tone.\u003c\/p\u003e\n  \n  \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1999-2006 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eGen III Vortec V8 (LR4, LM7, LQ4) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e255-345 hp \/ 285-380 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n \n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e1999-2006 GMC Sierra 1500 (V8 Models)\u003c\/li\u003e\n    \u003cli\u003eGMC Sierra 1500 4.8L V8\u003c\/li\u003e\n    \u003cli\u003eGMC Sierra 1500 5.3L V8\u003c\/li\u003e\n    \u003cli\u003eGMC Sierra 1500 6.0L V8\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eThe GMC Towing Caliber\u003c\/h3\u003e\n  \u003cp\u003eBuilt to handle the heavy payloads and high-stress towing environments typical for the GMT800 platform, this high-flow Y-pipe provides the structural durability and consistent low-end torque delivery required to keep your Sierra performing reliably under pressure.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48180703592696,"sku":"DS-ENGUD81RF","price":449.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-y-pipe-for-gmc-sierra-1999-2006-1.webp?v=1775147553"},{"product_id":"exhaust-3-inch-for-chevrolet-silverado-gmc-sierra-2000-2009-single-turbo-4-8l-5-3l-6-0l-6-2l","title":"Exhaust 3 Inch for Chevrolet Silverado GMC Sierra (2000-2009) Single Turbo 4.8L 5.3L 6.0L 6.2L","description":"\u003ch2\u003eHigh-Flow 3-Inch Turbo Exhaust for 2000-2009 Chevrolet, GMC Silverado, Sierra (Vortec \/ GMT800 \u0026amp; GMT900)\u003c\/h2\u003e\n  \n  \u003cp\u003e\u003cstrong\u003eThis 3-inch V-band exhaust tube with turndown integrates seamlessly with custom single turbo applications to evacuate exhaust gases efficiently.\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Stock Silverado, Sierra Exhaust Bottleneck\u003c\/h3\u003e\n  \u003cp\u003eWhen converting the 2000-2009 GMT800 and GMT900 chassis to a single turbo setup, the factory exhaust architecture becomes an immediate bottleneck. The OEM Gen III and Gen IV Vortec exhaust systems are designed for naturally aspirated airflow velocities, utilizing restrictive piping diameters and chambered mufflers that create massive backpressure under boost. In a turbocharged application, this backpressure drastically increases exhaust gas temperatures (EGTs) and induces heat soak, limiting the efficiency of the turbine and preventing the engine from effectively expelling combusted gases. Relying on inadequate piping leads to slower spool times, restricted top-end horsepower, and excessive thermal stress on internal engine components.\u003c\/p\u003e\n  \n  \u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n  \u003cp\u003eThis specifically engineered 3-inch turbo exhaust tube provides a direct-fit solution for Vortec single turbo conversions, eliminating the restriction inherent in standard configurations. Manufactured with precise tolerances, the 3-inch diameter optimizes exhaust gas velocity and scavenging post-turbine, significantly reducing backpressure and accelerating turbo spool characteristics. The inclusion of a robust 3-inch V-band clamp ensures a leak-free, high-pressure seal that resists the extreme thermal cycling and vibration typical of forced-induction LS\/Vortec builds. By integrating a dedicated turndown, the system efficiently directs high-temperature exhaust gases away from critical undercarriage components, maintaining optimal thermal management. Engineered to pair flawlessly with existing single turbo kits, it guarantees maximum volumetric efficiency.\u003c\/p\u003e\n  \n  \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2000-2009 Chevrolet, GMC Silverado, Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eGen III \u0026amp; IV Vortec \/ GMT800, GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e270-367 hp \/ 285-375 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n \n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e2000-2009 Chevrolet Silverado (Equipped with Single Turbo)\u003c\/li\u003e\n    \u003cli\u003e2000-2009 GMC Sierra (Equipped with Single Turbo)\u003c\/li\u003e\n    \u003cli\u003eCompatible with VORTEC 4.8L, 5.3L, 6.0L, 6.2L Engines\u003c\/li\u003e\n    \u003cli\u003eFits Vortec single turbo kits from listings 274835716844 \u0026amp; 353412173955\u003c\/li\u003e\n    \u003cli\u003eIncludes 3-inch V-band clamp and turndown tube\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eThe Chevrolet, GMC Heavy-Duty Standard\u003c\/h3\u003e\n  \u003cp\u003eTrucks built on the GMT800 and GMT900 platforms are legendary for their towing capacity and iron-block resilience. Adding forced induction demands components that match this rugged pedigree. This exhaust turndown tube delivers the robust performance and high-heat reliability required to handle the extreme load stresses and high-torque demands of a turbocharged Silverado or Sierra.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48204944933112,"sku":"DS-E71MAV57K","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-3-inch-for-chevrolet-silverado-gmc-sierra-2000-2009-single-turbo-4-8l-5-3l-6-0l-6-2l-1.webp?v=1775583310"},{"product_id":"performance-headers-manifolds-chevrolet-silverado-gmc-sierra-2001-2016-duramax-6-6l-diesel","title":"Performance Headers Manifolds Chevrolet Silverado GMC Sierra (2001-2016) Duramax 6.6L Diesel","description":"\u003ch2\u003eHigh-Flow Performance Exhaust Manifolds for 2001-2016 (6.6L Duramax)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned to reduce exhaust gas temperatures (EGTs) and lower drive pressure, these stainless steel exhaust manifolds replace restrictive factory cast units to accelerate turbo spool-up and increase total airflow by up to 55 percent.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado \u0026amp; Sierra Restriction\u003c\/h3\u003e\n\u003cp\u003eThe factory cast iron exhaust manifolds on the 6.6L Duramax suffer from severe internal bottlenecks, specifically on the driver side where the cast design pinches down to clear steering components. This restricts exhaust volume and creates unequal exhaust gas distribution before reaching the up-pipes. Under heavy towing or tuned conditions, this restriction causes a sharp spike in drive pressure and elevates EGT levels. Furthermore, the OEM cast iron is highly prone to heat cycling fatigue, often leading to cracked walls, warped mounting flanges, and blown exhaust gaskets that bleed off the critical drive pressure required for efficient turbo operation.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese upgraded manifolds are manufactured from thick-walled stainless steel to resist the extreme thermal expansion and contraction cycles typical of heavy hauling applications. By redesigning the internal runner geometries and expanding the overall cross-sectional area, these headers yield up to a 55% increase in volumetric airflow over the stock cast units. This balanced flow equalizes cylinder bank pressures, driving the turbine wheel with greater kinetic energy to measurably reduce turbo lag. The resulting drop in exhaust backpressure lowers sustained EGTs during high-load scenarios, safeguarding internal engine components while freeing up usable torque. The kit includes fresh multi-layer steel (MLS) gaskets for reliable installation, engineered to integrate perfectly with OEM-length up-pipes.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2001-2016 GMC, Chevrolet Silverado, Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eLB7, LLY, LBZ, LMM, LML \/ GMT800, GMT900, K2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e300-397 hp \/ 520-765 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2001-2016 GMC Sierra 2500\/3500 6.6L Duramax Diesel\u003c\/li\u003e\n\u003cli\u003e2001-2016 Chevrolet Silverado 2500\/3500 6.6L Duramax Diesel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Note:\u003c\/strong\u003e These exhaust manifolds will ONLY work with OEM length up pipes!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to endure continuous high-load towing and grueling thermal stress, these manifolds restore necessary reliability to your Duramax platform. By providing essential EGT management and structural longevity, this upgrade ensures your heavy-duty rig maintains peak pulling power without the risk of blown gaskets or cracked castings.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48269305413880,"sku":"DS-EOM4KO87Z","price":409.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-headers-manifolds-chevrolet-silverado-gmc-sierra-2001-2016-duramax-6-6l-diesel-1.webp?v=1776897098"},{"product_id":"catalytic-converter-for-gmc-sierra-2015-2017-6-0l-front","title":"Catalytic Converter for GMC Sierra (2015-2017) 6.0L Front","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Front Catalytic Converter Y-Pipe for 2015-2017 GMC Sierra (K2XX HD)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit front catalytic converter assembly replaces degraded or clogged factory emissions units on the 2015-2017 Sierra 6.0L to restore proper exhaust velocity, engine breathing, and compliant emissions reduction without custom fabrication.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Substrate Degradation \u0026amp; Thermal Fatigue\u003c\/h3\u003e\n\u003cp\u003eHeavy-duty fleet and towing applications subject the \u003cstrong\u003eK2XX\u003c\/strong\u003e platform to extreme exhaust gas temperatures and sustained thermal cycling. Over extended mileage, the stock catalytic converters experience substrate wash-coat attrition, core sintering, and carbon fouling that choke cylinder scavenging. This internal breakdown triggers persistent P0420 and P0430 diagnostic trouble codes, elevates exhaust backpressure, degrades fuel efficiency, and compromises engine performance under heavy loads. Furthermore, factory weld seams and manifold connection flanges often suffer fatigue cracking in high-stress work environments.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact OEM geometric tolerances for the \u003cstrong\u003eL96\u003c\/strong\u003e 6.0L V8, this direct replacement front Y-pipe converter assembly delivers reliable emissions control and exhaust throughput. Built with a high-grade stainless steel outer shell, it resists oxidation, road salt corrosion, and thermal distortion. Internally, a heavy-duty ceramic honeycomb substrate is coated with advanced noble metal wash-coats to maximize gas-to-catalyst surface interaction. Precision-flanged connections, mandrel-formed transitions, and factory-located oxygen sensor bungs eliminate leak paths, prevent CEL illumination, and bolt directly to OEM manifolds without cutting or welding.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2015-2017 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eL96 Vortec 6000\u003c\/strong\u003e \/ \u003cstrong\u003eK2XX HD\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e360 hp \/ 380 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e645184\u003c\/strong\u003e, \u003cstrong\u003e213361\u003c\/strong\u003e, \u003cstrong\u003e645154\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2016-2017 GMC Sierra 2500 HD (6.0L V8 Gas, Front)\u003c\/li\u003e\n  \u003cli\u003e2015-2017 GMC Sierra 3500 HD (6.0L V8 Gas, Front)\u003c\/li\u003e\n  \u003cli\u003eNote: Fits gas V8 models only; does not fit 6.6L Duramax Turbo Diesel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the K2XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2015-2017 GMC Sierra equipped with the \u003cstrong\u003eL96\u003c\/strong\u003e 6.0L V8 engine.\u003c\/p\u003e\n\n\u003ch4\u003eIs this catalytic converter legal for road use nationwide?\u003c\/h4\u003e\n\u003cp\u003eThis assembly is 46-state EPA compliant but is not certified for sale or use in California, New York, Colorado, or Maine.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum durability under severe payload and commercial towing duty cycles, this assembly maintains structural integrity and exhaust flow balance through thousands of high-temperature cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67537966170360,"sku":"DS-E8IRIF1LG","price":255.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-gmc-sierra-2015-2017-6-0l-front-1.jpg?v=1790620133"},{"product_id":"catalytic-converter-for-gmc-sierra-1999-2006-4-3l-4-8l-5-3l-front","title":"Catalytic Converter for GMC Sierra (1999-2006) 4.3L 4.8L 5.3L Front","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Front Catalytic Converter Assembly for 1999-2006 GMC Sierra (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Front Catalytic Converter Assembly replaces degraded or clogged factory emissions units on the 1999-2006 Sierra to clear catalyst efficiency trouble codes, reduce exhaust backpressure, and restore proper manifold scavenging.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Converter Breakdown\u003c\/h3\u003e\n\u003cp\u003eOn aging \u003cstrong\u003eGMT800\u003c\/strong\u003e trucks, factory catalytic converters suffer from long-term thermal fatigue, carbon contamination, and internal substrate fracture. Decades of heavy towing cycles cause the precious metal washcoat to deplete, triggering recurring \u003cstrong\u003eP0420\u003c\/strong\u003e and \u003cstrong\u003eP0430\u003c\/strong\u003e diagnostic trouble codes. As the factory ceramic core deteriorates, melted or dislodged cell walls choke outgoing exhaust gases, leading to excessive backpressure, elevated exhaust gas temperatures (EGTs), sluggish throttle response, and lost low-end torque on \u003cstrong\u003eVortec\u003c\/strong\u003e platforms.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a bolt-on replacement, this front catalytic assembly utilizes a high-flow ceramic honeycomb substrate coated with an active catalyst washcoat to ensure efficient hydrocarbon and carbon monoxide conversion. The substrate is housed in durable, corrosion-resistant \u003cstrong\u003e409 stainless steel\u003c\/strong\u003e with precision-bent piping and heavy-duty, leak-free connection flanges that align with factory exhaust manifolds. Standard-threaded oxygen sensor bungs maintain factory \u003cstrong\u003eO2 sensor\u003c\/strong\u003e positioning, avoiding wire harness strain while maintaining accurate closed-loop fuel trim monitoring.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1999-2006 GMC Sierra 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eVortec (4.3L LU3, 4.8L LR4, 5.3L LM7) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e200-310 hp \/ 260-335 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e9063, 20370, 51097, 2010019, 50511, 19010\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1999-2006 GMC Sierra 1500 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1999-2006 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e1999-2006 GMC Sierra 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003eNote: Excludes 6.0L \/ 8.1L heavy-duty configurations; 48-state EPA compliant (Restricted in CA, NY, CO, ME).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT800 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2006 GMC Sierra equipped with the Vortec 4.3L, 4.8L, or 5.3L engine.\u003c\/p\u003e\n\n\u003ch4\u003eWill this resolve my P0420 \/ P0430 Check Engine Light?\u003c\/h4\u003e\n\u003cp\u003eYes, this unit restores proper catalytic reduction capacity to clear catalyst efficiency codes when installed on an engine with functional upstream sensors.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the daily demands of towing and payload duty, this converter delivers the heat tolerance, structural rigidity, and dependable backpressure relief required to keep your Sierra pulling hard on the job site.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67538071716088,"sku":"DS-EMKTHL8S9","price":202.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-gmc-sierra-1999-2006-4-3l-4-8l-5-3l-front-1.jpg?v=1790622043"},{"product_id":"high-flow-exhaust-manifold-and-up-pipes-for-gmc-sierra-2017-2025-6-6l-diesel","title":"High Flow Exhaust Manifold and Up Pipes for GMC Sierra (2017-2025) 6.6L Diesel","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Sil-Moly Exhaust Manifolds and Up Pipes for 2017-2025 GMC Sierra (K2XX \/ T1XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The High Flow Exhaust Manifold and Up Pipe Kit replaces restrictive factory manifolds and failure-prone OEM up-pipes on the 2017-2025 GMC Sierra 6.6L Duramax to lower exhaust gas temperatures (EGTs) and accelerate turbo spool under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra L5P Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust manifolds on the \u003cstrong\u003eDuramax L5P\u003c\/strong\u003e platform utilize restrictive cast geometries with pinched runner profiles designed to clear chassis constraints rather than optimize gas velocity. Over repeated heavy-load towing cycles, standard OEM up-pipe bellows develop fatigue cracks due to high thermal expansion and drive pressure. These exhaust leaks bleed turbine energy, elevate pre-turbo backpressure, raise baseline EGTs, and cause sluggish turbocharger response.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eCast from high-silicon molybdenum (\u003cstrong\u003esil-moly\u003c\/strong\u003e) ductile iron, these performance exhaust manifolds resist thermal fatigue, structural cracking, and flange warping under prolonged extreme heat. The paired heavy-gauge up-pipes feature internally sleeved \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e expansion bellows that isolate chassis vibration while shielding the flex joints from hot exhaust velocity. Precision CNC-machined port entries and enlarged primary runners balance exhaust flow between cylinder banks, optimizing drive pressure and reducing parasitic pumping losses into the variable geometry turbocharger.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2017-2025 GMC Sierra 2500HD \/ 3500HD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eDuramax L5P\u003c\/strong\u003e (6.6L Diesel) \/ \u003cstrong\u003eK2XX \/ T1XX\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e445–470 hp \/ 910–975 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDD448, DD508\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2017-2019 GMC Sierra 2500HD \/ 3500HD (6.6L Duramax L5P Turbo Diesel)\u003c\/li\u003e\n  \u003cli\u003e2020-2025 GMC Sierra 2500HD \/ 3500HD (6.6L Duramax L5P Turbo Diesel)\u003c\/li\u003e\n  \u003cli\u003eNote: Specifically engineered for the L5P platform; does not fit LB7, LLY, LBZ, LMM, or LML engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the K2XX \/ T1XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2017-2025 GMC Sierra equipped with the \u003cstrong\u003eDuramax L5P\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eIs aftermarket ECU tuning required for this manifold kit?\u003c\/h4\u003e\n\u003cp\u003eNo tuning is required, as the manifolds and up-pipes retain standard exhaust geometry and preserve all factory sensor and emissions systems.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy Duty Towing Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to withstand the demanding thermal cycles of commercial hauling and fifth-wheel towing, this exhaust assembly eliminates factory bellows failure while preserving turbo drive pressure on your heavy-duty Sierra.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67541212201208,"sku":"DS-ESWPXISA6","price":1039.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-flow-exhaust-manifold-and-up-pipes-for-gmc-sierra-2017-2025-6-6l-diesel-1.jpg?v=1790663443"},{"product_id":"exhaust-kit-for-gmc-sierra-1999-2006-4-3l-4-8l-5-3l","title":"Exhaust Kit for GMC Sierra (1999-2006) 4.3L 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Dual Muffler-Back Exhaust Kit for 1999-2006 GMC Sierra (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The dual muffler-back exhaust kit replaces the restrictive factory single tailpipe on the 1999-2006 GMC Sierra \u003cstrong\u003eGMT800\u003c\/strong\u003e to decrease exhaust backpressure and optimize scavenging velocity on \u003cstrong\u003eVortec\u003c\/strong\u003e powerplants.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Exhaust Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eGMT800\u003c\/strong\u003e exhaust systems rely on highly baffled, high-impedance single mufflers and crush-bent tailpipes. These standard assemblies induce turbulent boundary layer drag, elevating exhaust gas temperatures (EGTs) and restricting volumetric efficiency under load. Corrosive thermal cycling and moisture accumulation also degrade original aluminized joints over time.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis dual conversion splits flow through a \u003cstrong\u003eFlowsound\u003c\/strong\u003e 2-chamber muffler utilizing a 3-inch inlet and dual 2.5-inch outlets. Paired with 2.5-inch mandrel-bent aluminized steel tailpipes, the system maintains consistent cross-sectional diameter to eliminate internal bottlenecks. The parallel-exit geometry is engineered to route cleanly along the frame rails while maintaining full clearance for OEM receiver hitches and factory-sized spare tires.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Flowsound 2-chamber muffler (single 3\" inlet, dual 2.5\" outlets)\u003c\/li\u003e\n  \u003cli\u003e2 aluminized mandrel-bent two-piece 2.5\" tail pipes (slip-together)\u003c\/li\u003e\n  \u003cli\u003e8 muffler clamps\u003c\/li\u003e\n  \u003cli\u003e1 larger exhaust clamp\u003c\/li\u003e\n  \u003cli\u003e4 rubber-insulated hangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1999-2006 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eVortec (LU3, LR4, LM7) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e200–295 hp \/ 260–335 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1999-2006 GMC Sierra 1500 \/ 2500 with 4.3L V6, 4.8L V8, or 5.3L V8 gasoline engines\u003c\/li\u003e\n  \u003cli\u003eFits all wheelbases\u003c\/li\u003e\n  \u003cli\u003eOnly compatible with configurations originally equipped with a factory single-inlet muffler\u003c\/li\u003e\n  \u003cli\u003eExcludes diesel platforms and factory dual-inlet muffler configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT800 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this fits the 1999-2006 GMC Sierra \u003cstrong\u003eGMT800\u003c\/strong\u003e equipped with \u003cstrong\u003eVortec 4300\u003c\/strong\u003e, \u003cstrong\u003eVortec 4800\u003c\/strong\u003e, or \u003cstrong\u003eVortec 5300\u003c\/strong\u003e engines, excluding models that came from the factory with dual-inlet mufflers.\u003c\/p\u003e\n\n\u003ch4\u003eIs this kit a direct bolt-on installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this is not a direct bolt-on kit; an experienced installer may need to cut or fabricate adapter sections, and exhaust tips are not included.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Sierra Towing Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle severe duty cycles and aggressive payload demands, this system provides durable aluminized corrosion resistance and low-restriction gas evacuation that keeps your \u003cstrong\u003eGMT800\u003c\/strong\u003e performing under heavy towing loads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562629660920,"sku":"DS-EB2HGYGFL","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-kit-for-gmc-sierra-1999-2006-4-3l-4-8l-5-3l-1.jpg?v=1790987529"},{"product_id":"exhaust-kit-for-gmc-sierra-2007-2015-4-3l-6-2l","title":"Exhaust Kit for GMC Sierra (2007-2015) 4.3L 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Dual Exhaust Conversion Kit for 2007-2015 GMC Sierra (GMT900 \/ K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The dual exhaust kit converts factory single-exit tailpipes into a dual 2.5-inch configuration on 2007-2015 GMC Sierra trucks to reduce exhaust backpressure and increase exhaust gas velocity behind the muffler.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Exhaust Restriction and Flow Limitation\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust routing on the \u003cstrong\u003eGMT900\u003c\/strong\u003e and \u003cstrong\u003eK2XX\u003c\/strong\u003e platforms relies on a single tailpipe exit with crush-bent transitions that choke volumetric efficiency. Under load or heavy towing, the stock single-tailpipe configuration produces excessive backpressure, trapping thermal energy in the post-muffler tract and restricting cylinder scavenging on both the \u003cstrong\u003eVortec\u003c\/strong\u003e and \u003cstrong\u003eEcoTec3\u003c\/strong\u003e platforms.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis conversion kit introduces a high-flow, smooth-transition Y-pipe featuring a single 3-inch inlet splitting into dual 2.5-inch mandrel-bent aluminized steel tailpipes. Mandrel bending preserves internal cross-sectional diameter throughout every radius, eliminating flow turbulence and velocity drops. The dual pipes route straight back along the frame rails to clear OEM spare tires and factory receiver hitches, venting exhaust gases evenly through two 3.5-inch polished chrome tips.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 high-flow Y-pipe (single 3\" inlet, dual 2.5\" outlets)\u003c\/li\u003e\n  \u003cli\u003e2 aluminized mandrel-bent 2.5\" tailpipes\u003c\/li\u003e\n  \u003cli\u003e2 weld-on chrome-plated tips (3.5\" round x 18\" long)\u003c\/li\u003e\n  \u003cli\u003e8 muffler clamps\u003c\/li\u003e\n  \u003cli\u003e1 large exhaust clamp\u003c\/li\u003e\n  \u003cli\u003e4 rubber-insulated hangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2007-2015 GMC Sierra 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e4.3L (LU3, LV3), 6.2L (L92, L86) \/ GMT900, K2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e195-420 hp \/ 260-460 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 (GMT900) 4.3L V6 \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2014-2015 GMC Sierra 1500 (K2XX) 4.3L EcoTec3 V6 \/ 6.2L EcoTec3 V8\u003c\/li\u003e\n  \u003cli\u003eGasoline and Flex-Fuel models equipped with factory single-inlet muffler configurations\u003c\/li\u003e\n  \u003cli\u003eAll factory wheelbase configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT900 and K2XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is designed for 2007-2015 GMC Sierra models equipped with the 4.3L and 6.2L engines. \u003cstrong\u003eThis kit does not include a muffler and is strictly compatible with models originally equipped with a single-inlet muffler configuration; models with dual-inlet factory mufflers are excluded.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eIs this exhaust system a direct bolt-on installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this is a universal-fit builder kit that may require cutting, fabrication, or a 2.5-to-3-inch\/2.75-to-3-inch adapter pipe depending on your specific intermediate pipe layout.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle rigorous towing and heavy payload conditions, this aluminized steel routing maintains critical clearance around leaf springs, shocks, and spare-tire carriers while providing clean thermal dissipation under continuous high-load hauling.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562632937720,"sku":"DS-EY3Z1SFYA","price":265.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-kit-for-gmc-sierra-2007-2015-4-3l-6-2l-1.jpg?v=1790987780"},{"product_id":"exhaust-kit-for-gmc-sierra-2014-2015-5-3l","title":"Exhaust Kit for GMC Sierra (2014-2015) 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Dual Exhaust Conversion Kit for 2014-2015 GMC Sierra (K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The High-Flow Dual Exhaust Conversion Kit replaces the restrictive factory single tailpipe on the 2014-2015 GMC Sierra to reduce post-muffler backpressure and improve exhaust velocity under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Tailpipe Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust architecture on the \u003cstrong\u003eK2XX\u003c\/strong\u003e platform forces all exhaust gas through a single crush-bent tailpipe. These factory compression bends reduce the internal cross-sectional diameter by up to 15%, increasing thermal retention and creating parasitic backpressure that impedes exhaust scavenging on the \u003cstrong\u003eEcoTec3 L83\u003c\/strong\u003e engine during sustained towing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis conversion kit introduces a single 3-inch to dual 2.5-inch high-flow Y-pipe feeding mandrel-bent aluminized steel tailpipes. The constant-radius bends maintain uniform cross-sectional volume to reduce exhaust gas turbulence and manage thermal load. Dual 2.5-inch tubing exits parallel to the chassis frame rail, cleared for OEM receiver hitches and full-size spare tires. Complete with dual 3.5-inch by 18-inch weld-on chrome tips, this custom-fit kit offers maximum durability for truck duty cycles. Note: An aftermarket or factory muffler is not included; fabricator fitting or adapters (2.5-to-3 inch or 2.75-to-3 inch) may be required.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 high-flow Y-pipe (single 3\" inlet, dual 2.5\" outlets)\u003c\/li\u003e\n  \u003cli\u003e2 aluminized mandrel-bent 2.5\" tail pipes\u003c\/li\u003e\n  \u003cli\u003e2 weld-on chrome-plated tips (3.5\" round x 18\" long)\u003c\/li\u003e\n  \u003cli\u003e8 muffler clamps\u003c\/li\u003e\n  \u003cli\u003e1 larger exhaust clamp\u003c\/li\u003e\n  \u003cli\u003e4 rubber-insulated hangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2014-2015 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eEcoTec3 5.3L L83\u003c\/strong\u003e \/ \u003cstrong\u003eK2XX\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e355 hp \/ 383 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2014-2015 GMC Sierra 1500 5.3L V8 Gasoline (Factory single-inlet muffler)\u003c\/li\u003e\n  \u003cli\u003e2014-2015 GMC Sierra 1500 5.3L V8 Flex-Fuel (Factory single-inlet muffler)\u003c\/li\u003e\n  \u003cli\u003eFits all cab styles and bed lengths \/ wheelbases\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the K2XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is designed for the 2014-2015 GMC Sierra equipped with the \u003cstrong\u003eL83\u003c\/strong\u003e 5.3L engine and a factory single-inlet muffler. \u003cstrong\u003eExcludes models equipped with dual-inlet factory mufflers, 4.3L V6, or 6.2L V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eIs this a direct bolt-on installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this is a builder kit that requires custom alignment and professional installation; sizing adapters (2.5-to-3 inch or 2.75-to-3 inch) and pipe trimming may be required depending on your muffler configuration.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Truck Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe duty towing and payload cycles, this dual conversion delivers reliable thermal dissipation while preserving underbody clearance over rough job sites and road debris.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562633789688,"sku":"DS-E6CT81KQ5","price":265.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-kit-for-gmc-sierra-2014-2015-5-3l-1.jpg?v=1790987882"},{"product_id":"exhaust-kit-for-gmc-sierra-2001-2006-6-0l","title":"Exhaust Kit for GMC Sierra (2001-2006) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Dual Muffler-Back Exhaust Kit for 2001-2006 GMC Sierra (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The dual muffler-back exhaust kit replaces the restrictive factory single tailpipe on the 2001-2006 GMC Sierra to reduce exhaust gas backpressure and optimize scavenging efficiency on 6.0L V8 applications.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Exhaust Restriction\u003c\/h3\u003e\n\u003cp\u003eThe OEM exhaust system on the \u003cstrong\u003eGMT800\u003c\/strong\u003e platform relies on a heavily baffled, chambered factory muffler and a single crush-bent tailpipe. This configuration creates excessive parasitic backpressure on high-displacement \u003cstrong\u003eVortec 6000\u003c\/strong\u003e (LQ4\/LQ9) engines, restricting thermal dissipation and choking high-RPM gas flow during continuous heavy-load towing cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis kit upgrades the rear exhaust architecture using a 3-inch single-inlet to dual 2.5-inch outlet Flowsound two-chambered muffler coupled to mandrel-bent aluminized steel tailpipes. Smooth-radius mandrel bends maintain uniform cross-sectional diameter to minimize turbulent wall boundary layer drag, routing twin exits parallel to the outer frame rails while preserving clearance for factory receiver hitches and standard-sized spare tires.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Flowsound 2-chamber muffler (single 3\" inlet, dual 2.5\" outlets)\u003c\/li\u003e\n  \u003cli\u003e2 aluminized mandrel-bent two-piece 2.5\" tail pipes (slip-together)\u003c\/li\u003e\n  \u003cli\u003e8 muffler clamps\u003c\/li\u003e\n  \u003cli\u003e1 larger exhaust clamp\u003c\/li\u003e\n  \u003cli\u003e4 rubber-insulated hangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2001-2006 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eVortec 6000 (LQ4\/LQ9) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e300 hp \/ 360 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001-2006 GMC Sierra 1500HD, 2500, 2500HD, 3500 with 6.0L V8\u003c\/li\u003e\n  \u003cli\u003eGasoline and flex-fuel variants equipped with factory single-inlet mufflers\u003c\/li\u003e\n  \u003cli\u003eCompatible with all factory wheelbases\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT800 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a fit for 2001-2006 GMC Sierra trucks equipped with the \u003cstrong\u003eVortec 6000\u003c\/strong\u003e engine that came from the factory with a single-inlet muffler; it will not fit models factory-equipped with dual-inlet mufflers.\u003c\/p\u003e\n\n\u003ch4\u003eIs this a direct bolt-on installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this is not a direct bolt-on kit; an experienced installer may need to cut or fabricate adapter piping since no components forward of the muffler inlet are included.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt for the structural and thermal demands of hauling and heavy payload service, this mandrel-bent aluminized setup provides continuous thermal stability and rugged structural support without compromising trailer hitch or spare tire geometry under full suspension articulation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562635034872,"sku":"DS-EOPLQKC1Y","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-kit-for-gmc-sierra-2001-2006-6-0l-1.jpg?v=1790988032"},{"product_id":"exhaust-kit-for-gmc-sierra-2016-2018-4-3l-5-3l-6-2l","title":"Exhaust Kit for GMC Sierra (2016-2018) 4.3L 5.3L 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Dual Muffler-Back Exhaust Kit for 2016-2018 GMC Sierra (K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The dual muffler-back exhaust kit replaces the restrictive factory muffler and single tailpipe on the 2016-2018 GMC Sierra to reduce exhaust gas backpressure, improve scavenging, and optimize acoustic flow.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Exhaust Restriction and Acoustic Dampening\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust assemblies on the \u003cstrong\u003eK2XX\u003c\/strong\u003e platform utilize oversized, baffled single-inlet mufflers designed strictly for sound attenuation rather than flow efficiency. These internal chambers restrict exhaust velocity, trap excessive heat forward of the rear axle, and suppress exhaust scavenging on high-displacement platforms. Furthermore, the OEM single exit limits volume and throttle response under heavy engine loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis kit upgrades the exhaust architecture utilizing a Flowsound 2-chamber muffler with a 3.00-inch inlet splitting into dual 2.50-inch outlets. Paired with 2.5-inch mandrel-bent aluminized steel tailpipes, the continuous-radius bends eliminate internal crimping to maintain uniform gas velocity and structural integrity. Routed parallel to the frame rails, the geometry retains vital clearance around the factory spare tire and OEM receiver hitch while surviving high duty-cycle thermal expansion.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Flowsound 2-chamber muffler (single 3-inch inlet, dual 2.5-inch outlets)\u003c\/li\u003e\n  \u003cli\u003e2 Aluminized mandrel-bent two-piece 2.5-inch tailpipes (slip-fit configuration)\u003c\/li\u003e\n  \u003cli\u003e8 Muffler clamps\u003c\/li\u003e\n  \u003cli\u003e1 Heavy-duty exhaust clamp\u003c\/li\u003e\n  \u003cli\u003e4 Rubber-insulated mounting hangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100 style=\" border-collapse: collapse border: solid font-size: min-width:\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2016-2018 GMC Sierra 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e4.3L LV3, 5.3L L83, 6.2L L86 EcoTec3 \/ K2XX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e285–420 hp \/ 305–460 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2016-2018 GMC Sierra 1500 4.3L V6 EcoTec3 (LV3) Gasoline\/Flex-Fuel\u003c\/li\u003e\n  \u003cli\u003e2016-2018 GMC Sierra 1500 5.3L V8 EcoTec3 (L83) Gasoline\/Flex-Fuel\u003c\/li\u003e\n  \u003cli\u003e2016-2018 GMC Sierra 1500 6.2L V8 EcoTec3 (L86) Gasoline\u003c\/li\u003e\n  \u003cli\u003eFits all standard wheelbases with factory single-inlet muffler configurations only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the K2XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this system fits 2016-2018 GMC Sierra trucks equipped with the \u003cstrong\u003eLV3\u003c\/strong\u003e, \u003cstrong\u003eL83\u003c\/strong\u003e, or \u003cstrong\u003eL86\u003c\/strong\u003e engines; it is not compatible with dual-inlet factory mufflers, diesel variants, or 2500HD\/3500HD chassis.\u003c\/p\u003e\n\n\u003ch4\u003eIs this exhaust system a direct bolt-on installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this is a custom-fit builder kit requiring an experienced installer to measure, cut, or adapt pipe sections forward of the muffler depending on cab length and wheelbase.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Sierra Towing Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe towing cycles and heavy payloads, this aluminized steel setup provides the durability and heat resistance required for heavy working conditions without compromising critical frame or suspension clearances.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562640277752,"sku":"DS-E261SQPEG","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-kit-for-gmc-sierra-2016-2018-4-3l-5-3l-6-2l-1.jpg?v=1790988445"},{"product_id":"shorty-exhaust-header-for-gmc-sierra-2007-2013-4-8l-5-3l-6-2l","title":"Shorty Exhaust Header for GMC Sierra (2007-2013) 4.8L 5.3L 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Shorty Exhaust Headers for 2007-2013 GMC Sierra (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Shorty Exhaust Header replaces the restrictive factory cast-iron exhaust manifolds on the 2007-2013 GMC Sierra to scavenge exhaust gases efficiently, reduce backpressure, and increase torque output across the mid-range powerband.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Manifold Failure Points \u0026amp; Exhaust Restrictions\u003c\/h3\u003e\n\u003cp\u003eFactory cast-iron manifolds on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform are notorious for exhaust leaks caused by sheared rear manifold bolts, warpage from uneven thermal cycles, and severe port restriction. The OEM log-style architecture forces adjacent cylinders to dump directly into a turbulent common plenum, creating excessive exhaust backpressure and cylinder heat retention. Over time, the combined stress of towing loads and engine vibration leads to cracked castings, blown flange gaskets, and degraded exhaust velocity on factory \u003cstrong\u003eGen IV Small Block\u003c\/strong\u003e engines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese shorty exhaust headers eliminate structural cracking and gas reversion by utilizing smooth-flowing 1.75-inch primary tubes in an 8-2 layout feeding into a 2 3\/8-inch collector outlet. Fabricated from heavy-gauge stainless steel with a high-luster 3-stage polish finish, the runners are joined with precision TIG and MIG welds to endure sustained exhaust gas temperatures. A heavy-duty 7\/16-inch CNC-machined cylinder head flange resists heat cycling distortion to prevent blowouts, while the 3\/8-inch collector flange guarantees a positive seal to downpipes. Integrated dual O2 sensor bungs allow plug-and-play installation without custom wiring or air-fuel monitoring errors.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Stainless Steel Exhaust Headers\u003c\/li\u003e\n  \u003cli\u003eExhaust Manifold Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2007-2013 GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eVortec 4800 (LY2\/L20), Vortec 5300 (LH6\/LY5\/LMG\/LC9), Vortec 6200 (L92\/L9H) \/ GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e295-403 hp \/ 305-417 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 6.2L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT900 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct bolt-on fit for the 2007-2013 GMC Sierra equipped with the \u003cstrong\u003e4.8L\u003c\/strong\u003e, \u003cstrong\u003e5.3L\u003c\/strong\u003e, and \u003cstrong\u003e6.2L\u003c\/strong\u003e Gen IV V8 engines.\u003c\/p\u003e\n\n\u003ch4\u003eWill installing these shorty headers require an ECU tune?\u003c\/h4\u003e\n\u003cp\u003eNo, an ECU re-tune is not mandatory since primary oxygen sensor positions and factory collector locations are retained, though custom tuning maximizes gains.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Hauling Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle the high thermal stress of towing payloads and continuous hill climbs, these headers deliver the structural durability and uninhibited scavenging flow required to keep your Sierra running cool and strong under load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67564817481976,"sku":"DS-ETEL5943E","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/shorty-exhaust-header-for-gmc-sierra-2007-2013-4-8l-5-3l-6-2l-1.jpg?v=1791049343"}],"url":"https:\/\/performancechiptuning.com\/collections\/gmc-sierra-exhaust.oembed","provider":"Performance Chip Tuning","version":"1.0","type":"link"}