{"product_id":"high-flow-exhaust-manifold-and-up-pipes-for-chevrolet-silverado-2017-2025-6-6l-diesel","title":"High Flow Exhaust Manifold and Up Pipes for Chevrolet Silverado (2017-2025) 6.6L Diesel","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Cast Sil-Moly Exhaust Manifolds and Up Pipes for 2017-2025 Chevrolet Silverado (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 the restrictive factory exhaust components on the 2017-2025 Silverado 6.6L to reduce drive pressure, drop exhaust gas temperatures (EGTs), and improve turbocharger spool efficiency under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Thermal Fatigue and Flow Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust manifolds on the \u003cstrong\u003e6.6L Duramax L5P\u003c\/strong\u003e rely on restrictive, log-style castings designed around engine-bay packaging rather than fluid dynamics. Unequal runner lengths create asymmetric exhaust pulses, elevating backpressure at the cylinder head and increasing parasitic pumping losses. Compounding this, the OEM thin-gauge up-pipe bellows lack structural internal support. Under heavy towing duty and thermal cycling, these factory bellows fatigue, crack, and create high-pressure pre-turbo exhaust leaks that increase spool latency and cause soot buildup.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis manifold and up-pipe system resolves thermal distortion and flow choking through material integrity and fluid design. The manifolds are cast from high-silicon molybdenum (\u003cstrong\u003esil-moly\u003c\/strong\u003e) ductile iron, providing superior resistance to thermal fatigue, oxidation, and flange warping up to 1,400°F. Internal port diameters are matched to cylinder head exhaust ports to eliminate flow turbulence. The accompanying heavy-duty up pipes are constructed with \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e and feature internally sleeved flex bellows that absorb longitudinal thermal expansion without collapsing or restricting pre-turbine exhaust velocity.\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 Chevrolet Silverado 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;\"\u003e6.6L Duramax L5P \/ K2XX \u0026amp; T1XX\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 Chevrolet Silverado 2500HD 6.6L Duramax L5P (K2XX Platform)\u003c\/li\u003e\n  \u003cli\u003e2017-2019 Chevrolet Silverado 3500HD 6.6L Duramax L5P (K2XX Platform)\u003c\/li\u003e\n  \u003cli\u003e2020-2025 Chevrolet Silverado 2500HD 6.6L Duramax L5P (T1XX Platform)\u003c\/li\u003e\n  \u003cli\u003e2020-2025 Chevrolet Silverado 3500HD 6.6L Duramax L5P (T1XX Platform)\u003c\/li\u003e\n  \u003cli\u003eNote: Fits 6.6L Duramax L5P diesel engines only; does not fit older LB7, LLY, LBZ, LMM, or LML platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the K2XX and T1XX Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2017-2025 Chevrolet Silverado equipped with the \u003cstrong\u003eL5P\u003c\/strong\u003e engine across both chassis generations.\u003c\/p\u003e\n\n\u003ch4\u003eWill installing these manifolds and up pipes require custom ECU tuning?\u003c\/h4\u003e\n\u003cp\u003eNo, this assembly is a direct mechanical bolt-on replacement that retains factory turbocharger flange locations and does not trigger check engine lights or require calibration changes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Duramax Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for severe-service heavy-duty hauling, this cast sil-moly and sleeved stainless setup maintains critical exhaust manifold pressure ratios under sustained peak torque, safeguarding turbo life and exhaust tract durability when towing at maximum GCWR.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67541195456760,"sku":"DS-EGMW37KXT","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-chevrolet-silverado-2017-2025-6-6l-diesel-1.jpg?v=1790663411","url":"https:\/\/performancechiptuning.com\/es\/products\/high-flow-exhaust-manifold-and-up-pipes-for-chevrolet-silverado-2017-2025-6-6l-diesel","provider":"Performance Chip Tuning","version":"1.0","type":"link"}