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The Cometic MLS head gasket for Chevrolet Mark‑IV GM Gen‑V/VI Big Block V8 (4.630" bore, .036" compressed thickness) combines embossed stainless steel layers and Viton-coated outer faces to seal high-output engines without additional sealants. The uncoated center shim can be varied for specific deck clearances and undersized water ports accommodate aftermarket head work. The construction resists corrosion, rebounds under load and helps reduce clamp-induced bore distortion.
Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .036in MLS Cylinder Head Gasket - 4.630in Bore
