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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.200in bore, nominal .056in) uses embossed stainless steel outer layers coated with Viton and AMP; compressed operating thickness is 0.056". An uncoated stainless shim center allows stack-up variation while the multilayer design resists corrosion, conforms load distribution across the bore, reduces clamp load, and provides dependable sealing between aluminum heads and iron or aluminum blocks without sealants.
Cometic Pontiac 400/428/455 V8 .056in MLS Cylinder Head Gasket - 4.200in Bore
