Cometic AMC 390 70 / 401 72-74 4.250in Bore .060 inch MLS-5 Head Gasket

This Cometic Multi-Layer Steel (MLS) head gasket features a compressed operating thickness of 0.060 inches and is designed for a 4.250-inch bore, making it suitable for AMC 390 and 401 Gen-3 V8 engines. It's built to handle the demands of high-output applications, offering reliable sealing without the need for additional sealants. This gasket is well-suited for combinations of aluminum heads with either aluminum or cast iron blocks, effectively managing the shearing forces that can occur between dissimilar metals.

The construction involves 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°F (250°C). This coating ensures a strong seal even in harsh environments and across various surface finishes. The center layer is uncoated stainless steel, and its thickness can be varied to meet specific requirements, allowing for precise control over the gasket's final compressed dimension.

This gasket fits a wide range of American Motors and Jeep vehicles from the 1970s and 1980s, including models like the Jeep CJ series, Jeep Cherokee, and American Motors Matador. Its robust construction makes it a solid option for rebuilding or maintaining these engines.