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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.380 inch bore) features multiple embossed stainless steel layers with Viton-coated outer faces and a compressed operating thickness of 0.070 inch. The center shim is uncoated stainless for thickness control. This MLS design seals reliably without sealants, tolerates mixed head/block materials, resists corrosion and shearing, and helps distribute clamp load to protect bore geometry.
Cometic Pontiac 400/428/455 V8 .070in MLS Cylinder Head Gasket - 4.380in Bore
