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Cometic's MLS head gasket for Chevrolet Mark‑IV big‑block V8 (4.320 inch bore) compresses to 0.066 inch and features multiple embossed stainless steel layers with Viton-coated outer faces. Engineered to seal aluminum heads to iron or aluminum blocks without sealants, the MLS design rebounds and resists corrosion while distributing clamp load to help reduce bore distortion in high-output applications.
Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .066 inch MLS Head Gasket
