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The Cometic MLS head gasket for GM LS Gen‑3/4 small-block V8 engines seals a 4.000-inch bore at .066 inch thickness without sealants. Multiple embossed stainless steel layers with Viton-coated outer faces and an uncoated center shim provide rebound, corrosion resistance and consistent load distribution. MLS construction reduces clamp load needs and helps limit bore distortion under heavy use.
Cometic GM LS1 SB 4.000 inch Bore .066 inch MLS Head Gasket
