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The Cometic MLS head gasket for GM big block V8 engines is a multi‑layer steel gasket with a 4.540 in bore and compressed thickness of 0.070 in, featuring embossed outer layers coated with Viton for heat and chemical resistance. MLS construction provides rebound, corrosion resistance and improved sealing across aluminum or cast‑iron interfaces without sealants. The center shim layer is uncoated stainless steel to accommodate thickness needs and improve load distribution across the sealing area.
Cometic Chevy BB 4.540in Bore .070 inch MLS 396/402/427/454 Head Gasket
