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This Cometic MLS head gasket is built for GM/Mercury big block Gen-IV marine and automotive V8s with a 4.500 in. bore and .040 in. compressed thickness. Constructed from multiple embossed stainless steel layers with Viton-coated outer faces, it includes two slotted valley bolts and is intended for high-sealing applications between aluminum heads and blocks or dissimilar materials without sealants.
Cometic Mercury / Chevy Big Block 4.5in Bore .040 inch MLS Head Gasket
