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The Cometic MLS head gasket for Chevrolet Mark‑IV GM Gen‑V/VI Big Block V8 (4.630" bore, .089" compressed thickness) employs embossed stainless steel layers with Viton-coated outer faces and an uncoated shim layer to permit thickness adjustment. Suitable for aftermarket heads with undersized water ports and for aluminum-to-aluminum or aluminum-to-iron combinations, it seals without sealants, resists corrosion, rebounds under load and helps distribute clamp force to reduce bore distortion.
Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .089in MLS Cylinder Head Gasket - 4.630in Bore
