Upgrading the OEM turbo gaskets on your 2001-2004 GM 6.6L Duramax is a smart choice for many Sierra and Silverado owners to ensure consistent and reliable turbocharger performance. Our turbo gaskets deliver a leak-free seal, even under high boost and extreme heat, preventing exhaust leaks and maintaining turbo efficiency. At Alligator Performance, we offer a variety of aftermarket turbo gaskets designed to help your truck withstand the high temperatures and pressures of demanding performance applications. Take your trucks turbo charger to the next level with our full 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.