2006-2007 GM Duramax 6.6L LBZ Engine Building Parts

Overhauling your 2006-2007 GM 6.6L Duramax LBZ engine can help improve the power and performance of your truck for every situation. Here at Alligator Performance, we carry a huge selection of premium engine building parts so you can outfit your Sierra/Silverado 2500/3500 with the best upgrades on the aftermarket. We offer everything from heads and gaskets to complete crate engines and everything else in between to ensure you can unlock your truck's full potential. GM Duramax Fitments: 2006, 2007 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.