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The Cometic StreetPro top-end gasket kit for Chevrolet Mark‑IV Big Block V8 (4.320 in bore, 0.040 in MLS head gasket) supplies the gaskets and seals required for a top-end rebuild. StreetPro kits are sold as top- or bottom-end sets to support partial or full engine work and use MLS, AFM, aramid fiber and armor-clad materials. Embossed MLS construction conforms to varying surfaces and clamp loads while offering practical sealing performance for budget builds.
Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.320in Bore-.040in MLS Cylinder Head Gasket
