Cometic Chevrolet Mark-IV Big Block V8 .027in MLS Cylinder Head Gasket - 4.630in Bore

If you're working on a Chevrolet Mark-IV Big Block V8 and need a new head gasket, this Multi-Layer Steel (MLS) gasket from Cometic is a solid option. It's designed for a 4.630-inch bore and has a compressed thickness of .027 inches. This gasket is built to handle the demands of high-output engines, offering a strong seal without needing any additional sealants.

Cometic builds these gaskets with multiple layers of stainless steel for increased strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This makes them suitable for use with both aluminum and cast iron blocks, and they can manage the shearing forces that can occur between different metal types. The center layer is uncoated stainless steel, and its thickness can be varied to meet different engine build requirements.

This gasket fits a wide range of Chevrolet vehicles from the 1960s through the 1990s, including popular models like the Impala, Chevelle, and C10 Pickup. It's a well-built component designed for reliable sealing in performance applications.