Cometic Pontiac 400/428/455 V8 .140in MLS Cylinder Head Gasket - 4.200in Bore

Cometic Gasket is well-known for making solid sealing solutions for performance engines. This Multi-Layer Steel (MLS) head gasket is built for Pontiac V8s like the 400, 428, and 455, featuring a 4.200-inch bore and a .140-inch thickness. It's designed to handle the demands of high-output engines, ensuring a reliable seal between your cylinder heads and block.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F and works well in tough sealing environments. This construction means the gasket can be used with both aluminum and cast iron blocks and heads, and it doesn't require any additional sealants to do its job effectively. The center layer is stainless steel and can be varied to achieve different thicknesses, like the .140-inch on this specific gasket.

This gasket fits a range of vehicles, including models like the Pontiac Firebird, Catalina, and Bonneville from the late 60s through the late 70s. It's a well-built component for anyone rebuilding or working on these classic Pontiac V8 engines.