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The Cometic MLS head gasket for Chevrolet Mark‑IV Big Block V8 (4.630" bore, .120" compressed thickness) delivers a reliable combustion and coolant seal for high-output engines. Built from multiple embossed stainless steel layers with Viton-coated outer faces and an uncoated stainless shim, it rebounds to resist corrosion, handles differing head/block materials, and requires no sealants while reducing clamp load and bore distortion.
Cometic Chevrolet Mark-IV Big Block V8 .120in MLS Cylinder Head Gasket - 4.630in Bore
