Cometic Chevy Big Block 4.630in Bore 0.043in Copper Head Gasket

Starting with a 0.043 inch thick copper construction, this Cometic head gasket is built for serious performance on Chevrolet Mark-IV Big Block V8 engines. Copper is a well-known material for head gaskets because it offers excellent thermal conductivity and can handle high cylinder pressures. This particular gasket is designed for a 4.630 inch bore, making it suitable for a wide range of big block applications.

The outer layers of this gasket are embossed and coated with Viton, a high-performance synthetic rubber. This combination helps to create a strong seal against the cylinder head and block, even under demanding conditions. The embossed layers provide a more consistent clamping force, while the Viton coating adds resistance to heat and combustion byproducts, helping to prevent leaks and ensure the longevity of your engine build.

This gasket fits a variety of GM and Chevy vehicles from the mid-60s through the mid-80s, including popular models like the Chevrolet Impala, C10 Pickup, and Corvette. It's a solid choice when you need a reliable seal for your big block engine rebuild.