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The Cometic multi-layer steel (MLS) head gasket for Chevrolet Big Block Gen IV (396/402/427/454) is a .098-inch compressed thickness gasket with a 4.320-inch bore. It uses multiple embossed stainless steel layers with Viton-coated outer faces for heat resistance and corrosion protection. MLS construction provides strong sealing performance for high-output engines and is suitable for aluminum-to-aluminum or aluminum-to-iron head/block combinations.
Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .098 inch MLS Head Gasket
