Cometic AMC 390/401 Gen-3 V8 .056in MLS Cylinder Head Gasket - 4.250in Bore

This product includes one Cometic Multi-Layer Steel (MLS) cylinder head gasket, designed for AMC 390/401 Gen-3 V8 engines with a 4.250-inch bore. It's built with multiple embossed layers of stainless steel, featuring outer layers coated with Viton rubber for superior sealing performance. This type of gasket is ideal for high-output engines and doesn't require any additional sealants, making installation more straightforward. It's well-suited for applications connecting aluminum heads to either aluminum or cast iron blocks, as it can handle the shearing forces that can occur between dissimilar metals.

The multi-layer steel construction provides increased strength and resilience, allowing the gasket to rebound and resist corrosion. The Viton coating on the outer layers is a heat-resistant material capable of withstanding temperatures up to 482°F (250°C), making it suitable for demanding sealing environments and various surface finishes. The center layer is uncoated stainless steel and can be varied in thickness to meet specific engine requirements, with this particular gasket having a compressed thickness of 0.098 inches and an uncompressed thickness of 0.056 inches.

This gasket fits a wide range of American Motors and Jeep vehicles from the late 1960s through the early 1990s, including models like the Jeep CJ series, AMC Ambassador, and Jeep Grand Wagoneer. It's a solid option when rebuilding or repairing the top end of these V8 engines.