{"product_id":"2015-2016-lml-6-6l-duramax-diese-3-inch-downpipe-exhaust","title":"2015.5-2016 6.6L LML Duramax Diese 3 inch Downpipe Exhaust","description":"\u003c!-- more --\u003e\n\u003ch4\u003eFITMENT\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2015.5-2016 6.6L Silverado \u0026amp; Sierra Duramax \u003cmeta charset=\"utf-8\"\u003eLML 2500HD\/3500HD Diesel engine pickup.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis downpipe features a 3-Bolt Flange connection at the turbo outlet. \u003c\/li\u003e\n\u003cli\u003eNOT fit 2011-2015.5 models that utilize the V-band style clamp connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDESCRIPTION\u003c\/h4\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eThe factory downpipe on Duramax LML trucks is a major performance bottleneck. To squeeze past tight engine bay clearances, GM engineers severely crushed and flattened the stock pipe.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis restricted \"pancake\" design chokes exhaust flow, traps excessive thermal energy right at the turbo charger, and spikes EGTs under heavy towing loads.\u003c\/li\u003e\n\u003cli\u003eUpgrading to smooth, 3\" mandrel-bent downpipe maximizes exhaust flow right from the turbo outlet, rapidly dropping EGTs and allowing the turbo to spool up much faster.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003e\u003cspan data-type=\"leaf\"\u003eKey Features\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePremium T-304 Stainless: Computerized Mandrel-Bends and heavy-duty 16-gauge T-304 SS ensure maximum rust-resistance and structural strength.\u003c\/li\u003e\n\u003cli\u003eTIG-Welded Construction: All joints are precision TIG welded and jig-built to prevent cracking under high thermal cycling and aggressive vibration.\u003c\/li\u003e\n\u003cli\u003eUnrestricted 3-Inch Bore: Replaces the restrictive, \"crushed\" factory oval pipe with a true, consistent 3-inch mandrel-bent round diameter through every turn.\u003c\/li\u003e\n\u003cli\u003eDrastic EGT Reduction: Smooths out exhaust flow to quickly draw extreme heat away from the turbo, reducing under-hood temperatures and protecting engine longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the main benefits of upgrading the late-LML downpipe?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: \u003cmeta charset=\"utf-8\"\u003eThe factory downpipe is severely crushed into a flat shape to clear the firewall. Replacing it with our true 3\" round mandrel-bent pipe lowers backpressure and EGTs significantly, eliminating turbo lag while freeing up a deep diesel exhaust note.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I tell if my truck needs the V-band or 3-bolt version?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Look at the turbo outlet. 11-15.5 trucks have a V-band clamp (hose clamp style, no bolts). 15.5-16 trucks have a 3-bolt flange (three bolts in a triangular pattern). Purchase as needed: \u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(43, 0, 255); text-decoration: underline;\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" title=\"11-16 LML DPF\/EGR Delete Kit\" href=\"https:\/\/www..com\/products\/-2011-2016-6-6l-duramax-lml-4-5-dp-back-dpf-egr-delete-kit\" target=\"_blank\"\u003e11-16 LML DPF\/EGR Delete Kit\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this downpipe require custom tuning?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: If installed on a stock truck with all 2 factory sensors reinstalled correctly, no custom tuning is required and it will not trigger a Check Engine Light. If you choose to delete the sensors, an emission-delete tune is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What exhaust should I pair with this downpipe to maximize performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: \u003cmeta charset=\"utf-8\"\u003ePair this downpipe wit\u003cstrong\u003e \u003c\/strong\u003eLML \u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(43, 0, 255); text-decoration: underline;\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" title=\"DPF Delete Pipe\" href=\"https:\/\/www..com\/products\/-2015-5-2016-chevy-gmc-duramax-diesel-lml-dpf-cat-delete-pipe3-hole-flange-with-muffler\" target=\"_blank\"\u003eDPF Delete Pipe\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e or \u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(43, 0, 255); text-decoration: underline;\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" title=\"DP-Back Exhaust\" href=\"https:\/\/www..com\/products\/-2015-5-2016-6-6l-gm-duramax-l5p-5-downpipe-back-dpf-delete-race-pipe-exhaust\" target=\"_blank\"\u003eDP-Back Exhaust\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e. While this pipe frees up the turbo outlet, the delete pipe eliminates the restrictive factory DPF\/CAT downstream. Together, they create a fully unrestricted system that maximizes flow, slashes EGTs, and delivers a deep rumble with zero cabin drone.\u003c\/p\u003e","brand":"True American Diesel","offers":[{"title":"Default Title","offer_id":47261112172732,"sku":"DP-0038","price":278.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/4101\/8044\/files\/0038_ff480e65-9857-4ab7-a3b2-b234055acc92.png?v=1786464526","url":"https:\/\/trueamericandiesel.com\/products\/2015-2016-lml-6-6l-duramax-diese-3-inch-downpipe-exhaust","provider":"TrueAmericanDiesel","version":"1.0","type":"link"}