Cometic AMC 390 70 / 401 72-74 4.250in Bore .036 inch MLS Head Gasket

If you're rebuilding the top end of your AMC 390 or 401 engine, a quality head gasket is crucial for sealing combustion pressure and coolant. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of higher output engines, ensuring a solid seal between your cylinder head and block.

Cometic's MLS design uses 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 different surface finishes, making it suitable for aluminum heads on either aluminum or cast iron blocks. With a compressed thickness of 0.036 inches and a 4.250-inch bore, this gasket is designed for a precise fit on AMC 390 and 401 engines from the early 70s. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying the installation process.

This gasket fits a wide range of American Motors and Jeep vehicles from the late 60s through the early 90s, including models like the American Motors Ambassador, Jeep CJ7, and Jeep J10. Always double-check the fitment guide to ensure it matches your specific application.