Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .070in MLS Cylinder Head Gasket - 4.630in Bore

Starting with a compressed thickness of 0.070 inches, this Cometic Multi-Layer Steel (MLS) head gasket is built for serious performance. It's constructed with multiple embossed layers of stainless steel, giving it the strength to handle the demands of high-output engines. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F and works well with various sealing environments, load conditions, and surface finishes. This makes it a solid choice for both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks, as it can manage the shearing forces that can occur between different metals.

The multi-layer design not only adds strength but also allows the gasket to rebound and resist corrosion, which is crucial for long-term sealing performance. The center shim layer is stainless steel and can be varied to achieve different thickness requirements, like the 0.070-inch compressed thickness found here. This particular gasket is also noted for having undersized water ports, which allows for customization when used with aftermarket heads. It's designed to provide maximum sealing performance without needing additional sealants, making installation more straightforward.

This gasket fits a wide range of Chevrolet and GM Big Block V8 applications, including vehicles like the 1965-1975 Chevrolet Bel Air, 1968-1974 Chevrolet C10 Pickup, and 1967-1972 Chevrolet Camaro. It's suitable for use with aftermarket heads such as Brodix Big Duke and Brodie Heads.