Upgrading the OEM turbo gaskets on your 2001-2004 GM 6.6L Duramax is a smart move for Sierra and Silverado owners looking to ensure dependable turbocharger performance. Our turbo gaskets provide a secure, leak-free seal, even under high boost and extreme heat, preventing exhaust leaks and preserving turbo efficiency. At Alligator Performance, we offer a variety of aftermarket turbo gaskets designed to help your truck endure high temperatures and pressures during demanding conditions. Further upgrade your GM 6.6L Duramax with our excellent selection of Oil Pans, Valve Covers & Accessories and Fuel 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.