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Cometic MLS cylinder head gasket for GM LS Gen-3/4 small-block V8 engines with a 4.000-inch bore and 0.036-inch compressed thickness. Multiple embossed stainless steel layers with Viton-coated outer faces give reliable sealing for high-output engines without sealants. An uncoated center shim allows thickness tuning; MLS construction evens load across the sealing area, resists corrosion and material shearing, and requires less clamp load to reduce bore distortion. Viton coating rated to 250°C (482°F).
Cometic GM LS1 SB 4.000 inch Bore .036 inch MLS Head Gasket
