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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.300in bore, nominal .120in) pairs embossed stainless steel layers with Viton and AMP coatings on the outer faces for durable heat- and chemical-resistant sealing. Compressed operating thickness is 0.027". The uncoated center shim enables thickness adjustments, allowing the gasket to rebound under load, resist corrosion, and provide consistent sealing across mixed head/block materials without sealants.
Cometic Pontiac 400/428/455 V8 .120in MLS Cylinder Head Gasket - 4.300in Bore
