{"product_id":"stainless-steel-long-tube-headers-for-chevrolet-c-k-trucks-blazer-suburban-1973-1985-5-0l-5-7l","title":"Stainless Steel Long Tube Headers for Chevrolet C\/K Trucks Blazer Suburban (1973-1985) 5.0L 5.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Steel Long Tube Headers for 1973-1985 Chevrolet C\/K Trucks, Blazer, Suburban (Square Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Stainless Steel Long Tube Headers replace restrictive cast-iron exhaust manifolds on 1973-1985 Chevrolet C\/K Trucks, Blazer, and Suburban platforms to eliminate exhaust backpressure and optimize low-to-mid-range torque.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet C\/K Trucks, Blazer, Suburban Exhaust Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eSquare Body\u003c\/strong\u003e platforms running the \u003cstrong\u003eSmall Block Chevy (SBC)\u003c\/strong\u003e 305 ci (5.0L) and 350 ci (5.7L) utilize heavy, restrictive log-style cast-iron exhaust manifolds. These stock manifolds force adjacent exhaust pulses to collide within short, uneven runners, generating severe boundary-layer turbulence and excessive thermal retention near the cylinder head. This scavenging restriction chokes volumetric efficiency, trapping residual exhaust gas inside the combustion chamber and robbing torque needed for heavy hauling and towing applications.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum scavenging velocity, these long tube headers feature 1 5\/8-inch mandrel-bent \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e primary tubes designed to equalize backpressure across all cylinders. The smooth-radius geometry routes exhaust into large 3-inch merge collectors, producing a sustained low-pressure pulse that accelerates cylinder evacuation on the exhaust stroke. Thick, CNC-machined head flanges resist thermal warping and blowouts under heavy load cycles, while the corrosion-resistant polished finish withstands road debris and sustained thermal stress without rusting.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Long Tube Headers (Left and Right)\u003c\/li\u003e\n  \u003cli\u003e2 Collector Reducers\u003c\/li\u003e\n  \u003cli\u003e2 Header Gaskets\u003c\/li\u003e\n  \u003cli\u003eCollector Gaskets\u003c\/li\u003e\n  \u003cli\u003eMounting Bolts and Nuts\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;\"\u003e1973-1985 Chevrolet C\/K Trucks, Blazer, Suburban\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;\"\u003eSmall Block Chevy (5.0L \/ 5.7L) \/ Square Body (3rd Gen C\/K)\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;\"\u003e145-175 hp \/ 240-275 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\u003e1975-1985 Chevrolet C10 Pickup Small Block V8\u003c\/li\u003e\n  \u003cli\u003e1975-1985 Chevrolet K10 Pickup Small Block V8\u003c\/li\u003e\n  \u003cli\u003e1975-1985 Chevrolet K20 Pickup Small Block V8\u003c\/li\u003e\n  \u003cli\u003e1973-1985 Chevrolet C10 Suburban Small Block V8\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet Blazer Small Block 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 Square Body C\/K Trucks, Blazer, Suburban?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1973-1985 Chevrolet C\/K Trucks, Blazer, Suburban equipped with the \u003cstrong\u003eSmall Block Chevy (5.0L\/5.7L)\u003c\/strong\u003e engine in both 2WD and 4WD configurations.\u003c\/p\u003e\n\n\u003ch4\u003eAre header bolts and flange hardware required to be retorqued after installation?\u003c\/h4\u003e\n\u003cp\u003eYes, retorque the header mounting hardware after the first few thermal heat cycles to ensure the gaskets maintain an airtight seal against the cylinder head.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eConstructed specifically for the working demands of classic Chevy trucks and utility vehicles, these long tube headers deliver the structural rigidity, low-end grunt, and continuous thermal resilience required for heavy payload carrying and demanding towing conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67896025088248,"sku":"DS-EQ6PIUZ9D","price":237.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/stainless-steel-long-tube-headers-for-chevrolet-c-k-trucks-blazer-suburban-1973-1985-5-0l-5-7l-1.jpg?v=1793291083","url":"https:\/\/performancechiptuning.com\/products\/stainless-steel-long-tube-headers-for-chevrolet-c-k-trucks-blazer-suburban-1973-1985-5-0l-5-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}