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The Cometic MLS head gasket for Chevrolet Mark-IV Big Block V8 features a 4.630-inch bore and .098-inch compressed operating thickness. Described as a multi-layer steel gasket with embossed outer layers coated in Viton and an uncoated stainless center shim, it is specified to provide MLS-style sealing suitable for aluminum-to-aluminum and aluminum-to-iron applications and requires no sealants per the product notes.
Cometic BB 4.630in Bore .098in Chevy Mark IV Big Block (396 / 402 / 427) MLS Head Gasket
