{"product_id":"high-flow-up-pipes-downpipe-17-25-l5p-duramax","title":"High-Flow Up-Pipes (OEM-Length) Optional Downpipe | 2017–2026 L5P Duramax 6.6 (2500HD\/3500HD)","description":"\u003ch2\u003eOEM-Length Replacement High-Flow Up-Pipes (L5P Duramax)\u003c\/h2\u003e\n\u003cp\u003eGM gave the L5P a lot of power from the factory, but the stock up-pipes are a known choke point. The OEM-length replacement high-flow up-pipes are a direct bolt-on upgrade designed to reduce restriction and help the turbo breathe easier—without changing the factory-style layout.\u003c\/p\u003e\n\u003cp\u003eThe high-flow design increases exhaust airflow by \u003cstrong\u003eup to 46%\u003c\/strong\u003e by enlarging the OEM bottleneck area and smoothing out restrictive bends. The result is improved exhaust efficiency, reduced backpressure, and lower EGT potential under load.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eUp to 46% increased exhaust airflow \/ larger flow area vs. stock\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-length, direct bolt-on replacement\u003c\/strong\u003e (no custom fab required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty stainless construction\u003c\/strong\u003e with \u003cstrong\u003einternally-sleeved bellows\u003c\/strong\u003e built to handle heat, pressure, and engine movement\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStainless gaskets included\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eOEM cross reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGM Equivalent P\/Ns:\u003c\/strong\u003e \u003cstrong\u003e12676611\u003c\/strong\u003e, \u003cstrong\u003e12688021\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2017–2024 GM 6.6L Duramax (L5P)\u003c\/strong\u003e up-pipe kit \u003cbr\u003e Commonly listed for \u003cstrong\u003e2500HD \/ 3500HD Silverado \u0026amp; Sierra applications\u003c\/strong\u003e—confirm by model\/year if you’re ordering for a later truck.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDriver + passenger \u003cstrong\u003eOEM-length high-flow up-pipes\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStainless gaskets\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e Designed to retain factory-style configuration. Always verify fitment before ordering (especially on newer model years and emissions-package variations).\u003c\/p\u003e","brand":"Sasquatch Diesels","offers":[{"title":"High Flow Up Pipes","offer_id":46640035004593,"sku":null,"price":299.99,"currency_code":"USD","in_stock":true},{"title":"High Flow Up Pipes + DOWNPIPE","offer_id":46640035037361,"sku":null,"price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/3144\/8241\/files\/shopify_no_bg_holes_1.png?v=1770334445","url":"https:\/\/checkout.sasquatchdiesel.ca\/products\/high-flow-up-pipes-downpipe-17-25-l5p-duramax","provider":"Sasquatch Diesels","version":"1.0","type":"link"}