Cometic AMC 390/401 Gen-3 V8 .066in MLS Cylinder Head Gasket - 4.250in Bore

Starting with a multi-layer steel (MLS) construction, this Cometic head gasket is built for the demands of AMC 390 and 401 Gen-3 V8 engines. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, making it ideal for sealing aluminum heads to either aluminum or cast iron blocks. This design helps prevent issues caused by the shearing forces that can occur between different metal types.

The gasket's center layer is uncoated stainless steel and can be varied to achieve different thicknesses, allowing for precise tuning. This particular gasket has a bore size of 4.250 inches and a compressed thickness of 0.066 inches, designed to provide a solid seal without requiring additional sealants. Its multi-layer stainless steel build offers increased strength and resistance to corrosion, while also allowing the gasket to rebound effectively under pressure.

This head gasket is a well-built option for a wide range of American Motors and Jeep vehicles from the late 1960s through the early 1990s, including models like the Jeep CJ series and American Motors Ambassador. It's designed to perform reliably in high-output applications.