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The Cometic MLS head gasket for Chevrolet Mark‑IV Big Block V8 (4.375in bore, .023in) uses three to five stainless steel layers with embossed outer faces coated in Viton for heat-resistant sealing. The uncoated center shim can be adjusted for thickness, allowing the gasket to rebound and resist corrosion. This layered design conforms load distribution, lowers required clamp load and helps minimize bore distortion while sealing without added sealants.
Cometic Chevrolet Mark-IV Big Block V8 .023in MLS Cylinder Head Gasket - 4.375in Bore
