Cometic AMC 401 for Aftermarket Heads 4.380in Bore .040in MLS Head Gasket

Cometic Gasket is known for making well-built sealing components, and this Multi-Layer Steel (MLS) head gasket is a prime example. It’s designed for AMC 390 and 401 Gen-3 V8 engines, specifically when using aftermarket heads like Indy Heads, and features an 18-bolt pattern. This gasket is built to handle the demands of high-output engines, ensuring a strong seal between your cylinder head and engine block.

This MLS gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well with various surface finishes. The center layer is uncoated stainless steel and can be varied in thickness; in this case, the compressed operating thickness is 0.040 inches. These gaskets are suitable for use with aluminum heads on either aluminum or cast iron blocks, as they can manage the shearing forces that can occur between different metals. Because of their construction, these MLS gaskets do not require any additional sealants.

This gasket fits a range of vehicles, including models like the American Motors Javelin, Jeep Cherokee, and Jeep Wagoneer from the early to mid-1970s. It's a solid option for rebuilding or upgrading your engine.