Cometic 4.470 MLS Head Gasket .040 - BB Chevy / Mercury Marine RS004C19 each one is 100% pressure-tested

each one is 100% pressure-tested and shipped in expanding foam packaging

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Cometic 4.470 MLS Head Gasket .040 - BB Chevy / Mercury Marine RS004C19 each one is 100% pressure-testedComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". 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