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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.300in bore, nominal .070in) uses multiple embossed stainless steel layers with outer faces coated in Viton and AMP for heat and chemical resistance. Compressed operating thickness is 0.036". Its uncoated shim center layer allows thickness variation, providing reliable sealing between aluminum and iron components without sealants while reducing clamp load and bore distortion.
Cometic Pontiac 400/428/455 V8 .070in MLS Cylinder Head Gasket - 4.300in Bore
