Cometic Pontiac 455 Big Block V8 .051in MLS Street Pro Cylinder Head Gasket 4200in BoreCOMETIC 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 1970 1976 Pontiac Bonneville Base 1976 Pontiac Bonneville Brougham 1970 Pontiac Bonneville Safari 1970 1976 Pontiac Catalina Base