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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.200in bore, nominal .042in) uses multiple embossed stainless steel layers with outer faces coated in Viton and AMP to meet harsh sealing demands; compressed operating thickness is 0.098". The uncoated stainless shim center permits thickness variation while the multilayer design resists corrosion, improves load distribution, and seals reliably across mixed-material interfaces without sealants.
Cometic Pontiac 400/428/455 V8 .042in MLS Cylinder Head Gasket - 4.200in Bore
