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The Cometic MLS head gasket for GM/Mercury Marine Big Block V8 Gen‑IV/V/VI (4.500" bore; .027" compressed thickness) is specified for engines with four bolts in the lifter valley. Built from multiple embossed stainless steel layers with Viton‑coated outer faces, it seals high‑output marine engines without sealants. The layered construction rebounds under load, reduces clamp requirements and resists corrosion across varied mating surfaces.
Cometic GM/Mercury Marine Big Block V8 Gen-IV/V/VI .027in MLS Cylinder Head Gasket - 4.500in Bore
