Cometic Chevy Big Block Brodix Big Duke/Big Brodie Heads 4.31in Bore .080in MLS Head Gasket

When you're rebuilding a high-output Chevy Big Block engine with aftermarket heads like Brodix Big Duke or Big Brodie, getting the sealing right is critical. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of these powerful setups. It's designed to provide maximum sealing performance without needing any additional sealants, making your job a bit easier.

What makes these gaskets so effective is their construction. They're made from multiple layers of stainless steel, which gives them increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes. The center layer is stainless steel and can be varied in thickness; in this case, it's set to a compressed operating thickness of 0.036 inches with a 0.080-inch bore, specifically for a 4.31-inch bore size. This design is suitable for both aluminum-to-aluminum and aluminum-to-cast iron block combinations, as it can withstand the shearing forces that can occur between different metals.

This gasket fits a wide range of Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines, including popular models like the Chevrolet Impala, Corvette, and C10 Pickup from various years. The water ports are undersized to allow for customization during installation, giving you flexibility with aftermarket heads.