Cometic Chevy Mark-IV GM Gen-V/VI BB 4.630in Bore .098in MLS Head Gasket

When you're rebuilding the top end of your big block Chevy Mark-IV or GM Gen-V/VI engine, getting the cylinder head seal right is crucial. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of high-output applications. It's designed to provide a maximum seal without needing any additional sealants, making the installation process more straightforward.

These MLS gaskets are constructed from multiple layers of stainless steel, which gives them increased strength and the ability to rebound, helping them resist corrosion. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. The center layer is stainless steel and can be varied in thickness to meet different requirements; this particular gasket has a compressed thickness of 0.036 inches and a bore size of 4.630 inches. It's also designed with undersized water ports, which is a helpful feature when using aftermarket heads, allowing for customization during your build.

This gasket fits a wide range of vehicles, including popular models like the Chevrolet Impala, C10 Pickup, and Corvette from the 1960s and 70s. It's a solid option for both aluminum-to-aluminum and aluminum-to-cast iron block setups, as it can manage the forces created by different metal combinations.