Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .030in MLS Cylinder Head Gasket - 4.630in Bore

This is a Cometic Multi-Layer Steel (MLS) head gasket set for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines. It's designed with a 4.630-inch bore and a compressed thickness of .030 inches, making it a .030 inch undersize bearing set for specific applications. These gaskets are built to handle the demands of high-output engines and are suitable for use with aftermarket heads, featuring undersized water ports that allow for customization. They work well with both aluminum and cast iron blocks, and are specifically noted as suitable for Brodix Big Duke/Brodie heads.

The construction uses multiple embossed layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle harsh sealing environments and varying surface finishes, up to 482 degrees Fahrenheit. The center layer is stainless steel, allowing for thickness adjustments. Because they are MLS gaskets, they don't require any additional sealants for installation, simplifying the process.