Cometic GM/Mercury Marine Big Block V8 Gen-IV/V/VI .066in MLS Cylinder Head Gasket - 4.580in Bore 4-1 POLISHED S.S. HEADER Perrin 04-21 Subaru STI /

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Cometic GM/Mercury Marine Big Block V8 Gen-IV/V/VI .066in MLS Cylinder Head Gasket - 4.580in Bore 4-1 POLISHED S.S. HEADER Perrin 04-21 Subaru STI /Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 098". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two