Cometic Pontiac 400/428/455 V8 .060in MLS Cylinder Head Gasket - 4.300in Bore

This product includes a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for Pontiac 400, 428, and 455 V8 engines. It features a 4.300-inch bore and a thickness of 0.060 inches when uncompressed, with a compressed operating thickness of 0.027 inches. This gasket is built to handle the demands of high-output engines and is suitable for use with both aluminum and cast iron blocks, as well as aluminum heads.

The MLS construction uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material capable of withstanding temperatures up to 482 degrees Fahrenheit. This coating is designed to perform well in harsh sealing environments and on various surface finishes. The center layer is uncoated stainless steel, allowing for different thickness requirements.

This gasket fits a range of vehicles, including models like the Pontiac Firebird, Catalina, and Bonneville from the late 1960s through the late 1970s. Because it requires no additional sealants, it simplifies installation and ensures a reliable seal for your engine rebuild.