2001-2004 GM Duramax 6.6L LB7 Exhaust Manifolds

Improving the efficiency and effectiveness of your 2001-2004 GM 6.6L Duramax LB7 is made easy with these premium aftermarket exhaust manifolds! The stock exhaust manifold starts to fall short after adding on various performance mods to your engine, so it's best to stay ahead of any potential issues by upgrading to a more efficient system and high-performance exhaust manifold kit! Here at Alligator Performance, we only work with the best and most trusted brands in the industry to help you unlock the full potential out of your Sierra/Silverado 2500/3500. 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.