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The Cometic MLS cylinder head gasket for GM/Mercury Marine Big Block V8 Gen IV–VI is a .027" compressed-thickness, multi-layer steel gasket built for a 4.580" bore with four bolts in the lifter valley. Its embossed stainless steel outer layers are coated with Viton for heat and chemical resistance; a bare stainless shim layer provides controlled thickness. MLS construction rebounds under load, resists corrosion, and requires no sealants.
Cometic GM/Mercury Marine Big Block V8 Gen IV/V/VI 4.580in Bore .027in MLS Cylinder Head Gasket
