Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Cometic StreetPro top-end gasket kit for GM Gen-6 L21/29 454 Big Block V8 (.040" MLS) supplies the necessary gaskets and seals for a budget-focused street rebuild. StreetPro kits prioritize quality materials—MLS, AFM, aramid fiber and Armor Clad—so builders get compatible sealing components in one package. The kit targets those looking for a complete, value-oriented top-end gasket solution for a 4.375-inch bore application.
Cometic Street Pro GM Gen-6 L21/29 454 Big Block 4.375in Bore .040in Top End Gasket Kit
