The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.380 inch bore) uses multiple embossed stainless steel layers with Viton-coated outer faces and a compressed operating thickness noted near 0.098 inch. The uncoated stainless center shim can be varied for thickness needs. MLS gaskets seal without additional sealants, resist corrosion, withstand shearing between dissimilar metals, and help distribute clamp loads to reduce bore distortion in high-output engines.
Cometic Pontiac 400/428/455 V8 .080in MLS Cylinder Head Gasket - 4.380in Bore