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Cometic MLS head gasket for GM/Mercury Marine big-block V8 Gen IV/V/VI is a multi-layer stainless steel gasket with embossed outer layers coated in Viton and an uncoated stainless shim layer. It’s specified for a 4.580" bore and .070" nominal thickness, with a compressed operating thickness of 0.098" and fits blocks with four bolts in the lifter valley. MLS construction provides rebound, corrosion resistance, and strong sealing without sealants.
Cometic Mercury/Chevy BB 4.580in Bore .070in MLS-5 Gen 4/5/6 Blocks Head Gasket
