Cometic Pontiac 400/428/455 V8 .051in MLS Cylinder Head Gasket - 4.380in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring a Viton rubber coating on the outer layers. This construction is designed to handle the demands of high-output Pontiac V8 engines, specifically those with 400, 428, or 455 cubic inch displacements and a 4.380-inch bore. The Viton coating is heat resistant up to 482°F (250°C) and can handle harsh sealing environments, load conditions, and various surface finishes, making it suitable for both aluminum and cast iron block combinations.

With a compressed operating thickness of 0.051 inches, these MLS gaskets offer improved strength due to their layered stainless steel design, which also allows them to rebound and resist corrosion. They are engineered to provide maximum sealing performance without the need for additional sealants. The center shim layer is uncoated stainless steel, allowing for adjustments to thickness requirements, while the embossed outer layers with Viton ensure a solid seal against shearing forces between different block and head materials.

This gasket fits a range of classic Pontiac models, including the Bonneville, Catalina, Firebird, and LeMans, among others from the late 1960s through the late 1970s. It's a well-built component for rebuilding or repairing your Pontiac V8's top end.