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Cometic MLS cylinder head gasket for Pontiac 400/428/455 V8 engines, specified at a nominal .030 in thickness and a 4.380 in bore with embossed stainless layers. Outer faces are coated in heat‑resistant Viton while the center shim is uncoated stainless steel to allow thickness variation. MLS construction offers strong sealing for aluminum or cast‑iron block/head pairings without sealants and helps distribute clamp load to reduce bore distortion.
Cometic Pontiac 400/428/455 V8 .030in MLS Cylinder Head Gasket - 4.380in Bore
