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This Cometic StreetPro top-end gasket kit for GM Gen-5 L19 454 Big Block supplies an MLS .040" head gasket for a 4.375" bore and includes the necessary top-end gaskets and seals for a street rebuild. StreetPro kits are assembled with proven gasket materials like MLS, AFM and Aramid Fiber to provide a cost-aware, complete solution for routine engine top-end work.
Cometic Street Pro GM Gen-5 L19 454 Big Block 4.375in Bore .040in Top End Gasket Kit
