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The Cometic StreetPro top-end gasket kit for Chevrolet Mark‑IV Big Block V8 (4.630 in bore, 0.045 in MLS head gasket) supplies head gaskets and seals for a top-end rebuild. StreetPro kits are created for budget-conscious street-rod projects but use quality materials—MLS, AFM, aramid fiber and armor-clad parts. The embossed MLS construction handles demanding sealing environments and helps conform load distribution while limiting bore distortion.
Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.630in Bore-.045in MLS Cylinder Head Gasket
