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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.380 inch bore) offers a composed multi-layer stainless steel construction with embossed, Viton-coated outer layers and a compressed thickness indicated near 0.098 inch. The uncoated stainless center shim allows thickness variation while the MLS stack resists corrosion and shearing between dissimilar metals. It seals without additional sealants and spreads clamp load to help limit bore distortion.
Cometic Pontiac 400/428/455 V8 .056in MLS Cylinder Head Gasket - 4.380in Bore
