Cometic AMC 390/401 Gen-3 V8 .040in MLS Cylinder Head Gasket - 4.380in Bore

If you're rebuilding the top end of your AMC 390 or 401 Gen-3 V8 engine, a solid head gasket is crucial for sealing. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of higher output engines, ensuring a reliable seal between your cylinder head and block without needing extra sealants.

This gasket is constructed with multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes. This construction is ideal for mating aluminum heads to either aluminum or cast iron blocks, as it can withstand the forces created by dissimilar metals. The center shim layer is stainless steel, and its thickness is varied to achieve the specified 0.040 inch compressed operating thickness, with a 4.380 inch bore diameter.

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, Jeep Wagoneer, and American Motors Matador. Always refer to your vehicle's specific service manual for installation procedures.