2007.5-2010 GM Duramax 6.6L LMM Exhaust Manifolds

The stock exhaust manifold on your 2007.5-2010 GM 6.6L Duramax does it's job for basic everyday applications, but it doesn't offer the power and efficiency of an aftermarket exhaust manifold system. An exhaust manifold is a series of pipes that separates all of the exhaust gases into their own separate tube which then directs them to the cylinders, making for consistent and reliable performance each time you get behind the wheel. Here at Alligator Performance, we carry a selection of performance exhaust manifold kits so you can outfit your Sierra/Silverado 2500/3500HD with the best upgrades in the business! GM Duramax Fitments: 2007, 2009, 2010 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.