iFJF 2011-2015 GM Duramax LML 6.6L 4" Downpipe Back DPF Delete Race Pipe

Product Overview The early-generation 2011-2015 Duramax LML features a highly complex triple-emissions system (DPF + DOC + SCR/DEF) that chokes your engine. With 11 to 15.5 years on the road, these trucks have hit the peak failure window. Failed DEF heaters, drifting NOx sensors, and ash-plugged filters continuously throw fault codes, tank fuel mileage to a miserable 13-14 MPG, and trigger Limp Mode. Key Feature Rugged T-409 Stainless Steel Build: Manufactured from industrial-grade T-409 SS, perfectly optimized to expand and contract under intense thermal cycling without cracking or warping. Substantial EGT & Heat Reduction: Instantly drops exhaust backpressure, allowing scorching gases to exit the motor rapidly, dropping EGTs significantly under heavy sustained towing loads. Continuous 4" Mandrel-Bent Tubing: Engineered with smooth, 4" diameter paths featuring zero internal neck-downs or restrictive bungs, providing the ultimate sweet spot for exhaust gas velocity. FITMENT 2011-2015.5 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine with a V-Band Clamp. Does NOT Fit 2015.5-2016 models equipped with the 3-bolt flange. Please check underneath your truck! Please physically inspect underneath your truck to verify your turbo discharge style before purchasing!