Cometic Chevrolet Mark-IV Big Block V8 .027in MLS Cylinder Head Gasket - 4.375in Bore

This Cometic Multi-Layer Steel (MLS) head gasket is built with multiple embossed layers of stainless steel, featuring an outer coating of Viton rubber. This construction is key for sealing high-output engines, especially those with aluminum heads paired with either aluminum or cast iron blocks, as it can handle the shearing forces between dissimilar metals. The compressed operating thickness is precisely 0.027 inches, and the bore size is 4.375 inches, making it suitable for a wide range of Chevrolet Mark-IV Big Block V8 applications.

The stainless steel layers provide increased strength and the ability to rebound, while also resisting corrosion. The Viton coating on the outer layers is a heat-resistant material designed to perform in demanding sealing environments and various surface finishes, capable of withstanding temperatures up to 482 degrees Fahrenheit. The center shim layer is uncoated stainless steel, allowing for variations in thickness to meet specific requirements. These MLS gaskets are designed to provide maximum sealing performance without the need for additional sealants.

This gasket is a solid option for many Chevrolet vehicles from the mid-60s through the early 90s, including models like the Impala, Chevelle, and C10 Pickup. It's a well-built component intended for engines that demand reliable sealing under pressure.