Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head GasketCOMETIC 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. StreetPro gasket kits are sold as a top end kits and bottom end kits. Purchase both top and bottom end kits for a total engine 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