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The Cometic MLS head gasket for GM/Mercury Marine Big Block V8 (Gen IV/V/VI) is a multi-layer steel design for a 4.500 in bore with .040 in compressed thickness and four bolts in the lifter valley. Outer embossed layers are coated with Viton for heat and chemical resistance while the uncoated shim layer accommodates thickness needs. MLS construction improves sealing across harsh engine conditions without sealants.
Cometic GM/Mercury Marine Big Block V8 Gen-IV/V/VI 4.5in Bore MLS Cylinder Head Gasket
