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Cometic MLX head gasket for GM LS Gen-3/4 small-block V8s with a 4.040-inch bore and .052-inch thickness. The MLX construction uses an integrated stopper layer to improve combustion chamber sealing and increase clamp load around the cylinder without raising bore distortion. It’s specified as a direct replacement gasket matched to the listed bore and engine family.
Cometic GM LS Series V8 4.040in bore .052 inch MLX Head Gasket
