Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Cometic MLS head gasket for Chevrolet Mark‑IV GM Gen‑V/VI Big Block V8 (4.630" bore, .066" compressed thickness) uses embossed stainless steel layers with Viton-coated outer faces and an uncoated shim to accommodate thickness needs. Suitable for high-output applications and aftermarket heads with undersized water ports, it seals without sealants for aluminum or iron blocks, resists corrosion, rebounds under load and helps distribute clamp forces to reduce bore distortion.
Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .066in MLS Cylinder Head Gasket - 4.630in Bore
