{"product_id":"high-flow-exhaust-manifold-for-2017-2025-chevy-gmc-6-6l-duramax-l5p-diesel","title":"High Flow Exhaust Manifold for 2017–2025 Chevy GMC 6.6L Duramax L5P Diesel","description":"\u003cp\u003eThis High Flow Exhaust Manifold for 2017–2025 Chevy and GMC trucks equipped with the 6.6L Duramax L5P diesel is made from cast, high-sil moly and is engineered to improve exhaust flow, reduce restriction, and support better turbo response. The manifold and up-pipe exhaust system are designed to maximize power and flow characteristics, lower exhaust gas temperatures (EGTs) and accelerate turbo spool-up while increasing power, fuel economy, and maintaining reliability. Built for heavy-duty diesel use, this manifold is a reliable upgrade for replacing cracked, leaking, warped, or restrictive factory-style components and is suitable for daily driving, towing, hauling, and performance-focused Duramax applications.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2017–2019 Chevrolet Silverado 2500\/3500 HD -- 6.6L Duramax L5P\u003c\/li\u003e\n  \u003cli\u003e2017–2019 GMC Sierra 2500\/3500 HD -- 6.6L Duramax L5P\u003c\/li\u003e\n  \u003cli\u003e2020–2025 Chevrolet Silverado 2500\/3500 HD -- 6.6L Duramax L5P\u003c\/li\u003e\n  \u003cli\u003e2020–2025 GMC Sierra 2500\/3500 HD -- 6.6L Duramax L5P\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast high-sil moly construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUp-Pipe Construction:\u003c\/strong\u003e Aircraft-grade 304 stainless steel bellows with internally sleeved design and increased inner diameter for higher flow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUp-Pipe Wall Thickness:\u003c\/strong\u003e .120-inch wall thickness with 2-inch outside diameter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance Benefits:\u003c\/strong\u003e Lowers exhaust gas temperatures (EGTs), accelerates turbo spool-up, and increases power and fuel economy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEGT Port:\u003c\/strong\u003e Pre-molded and tapped for EGT gauge sensor installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e Includes 16 exhaust manifold mounting bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eThis is a direct-fit replacement for factory manifolds on 2017–2025 models. Professional installation is recommended to ensure proper sealing and turbo response optimization. Remove factory manifolds and bolt-on this high flow exhaust manifold assembly using OEM or upgraded fasteners.\u003c\/p\u003e\n\n\u003cp\u003eCheck local emissions regulations before purchase. Professional installation is recommended.\u003c\/p\u003e\n\n\u003cp\u003eGet the right part the first time.\u003c\/p\u003e","brand":"Performance Parts Factory","offers":[{"title":"Default Title","offer_id":52915774030133,"sku":"GM-570-1725","price":594.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/5036\/3957\/files\/GM-570-1725-1.webp?v=1780542702","url":"https:\/\/www.performancepartsfactory.com\/products\/high-flow-exhaust-manifold-for-2017-2025-chevy-gmc-6-6l-duramax-l5p-diesel","provider":"Performance Parts Factory","version":"1.0","type":"link"}