Cometic Street Pro 01-04 GM 6.6L Duramax 4.100in Bore Top End Gasket KitCOMETIC StreetPro Kits cater to the budget minded street rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad. This Part Fits: Year Make Model Submodel 2003 2004 Chevrolet C4500 Kodiak C4C042 2003 2004 Chevrolet C4500 Kodiak C4E042 2003 2004 Chevrolet C4500 Kodiak C4U042 2003 2004