2001-2004 GM Duramax 6.6L LB7 Engine Building Parts

Whether you're looking to completely rebuild your 2001-2004 GM 6.6L Duramax LB7, or you simply need some engine parts for preventative maintenance, here at Alligator Performance we have your back. Featuring one of the best and most reliable selection of engine building parts on the aftermarket, we carry everything from Pistons & Rings to complete Crate Engines to ensure you'll find what you need for your custom build. What's more, each one of these upgrades is built to either meet or exceed OEM specifications, ensuring a perfect fit and fucntion on your Sierra/Silverado 2500/3500 every single time. 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.