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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.200in bore, nominal .030in) uses embossed stainless steel outer layers coated with Viton and AMP, with a compressed operating thickness of 0.030". The uncoated center shim provides thickness flexibility while the multilayer stainless construction rebounds under load, resists corrosion, and delivers reliable sealing between aluminum and iron components without requiring additional sealants.
Cometic Pontiac 400/428/455 V8 .030in MLS Cylinder Head Gasket - 4.200in Bore
