2001-2004 GM 2500HD/3500HD 6.6L LB Duramax Exhaust Upgrades

Our 2001-2004 GM 6.6L Duramax LML exhaust systems are the perfect way to add both an aggressive exhaust note and a performance boost to your GM 2500HD/3500HD. Our selection of top-tier street-legal and off-road exhaust kits are far more efficient than your restrictive factory exhaust, delivering noticeable gains in horsepower and torque without the need for additional tuning. These premium kits provide an instant performance upgrade with no compromises. Beyond the power gains, they deliver an aggressive exhaust tone that’s sure to impress. We offer everything from single-exit and dual-exit kits to up-pipes, downpipes, and universal exhaust tips, allowing you to customize your entire system for the look and performance you desire! Pair your new exhaust system with our selection of Turbo Upgrades! GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.