Cometic Pontiac 400/428/455 V8 .086in MLS Cylinder Head Gasket - 4.200in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed stainless steel layers, 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 4.200-inch bore. The MLS design provides increased strength and resistance to corrosion, making it suitable for applications with aluminum heads on aluminum or cast iron blocks, as it can manage the shearing forces between different metals.

The Viton coating on the outer layers is heat resistant up to 482 degrees Fahrenheit and is engineered to perform in harsh sealing environments and varying surface finishes. The center shim layer is uncoated stainless steel, allowing for precise thickness control. When compressed, this gasket has an operating thickness of 0.098 inches, offering a robust seal without the need for additional sealants. This gasket fits a range of vehicles, including models like the Pontiac Firebird, Grand Prix, and LeMans from the late 60s through the late 70s.