Cometic GM LS1 SB 3.910 inch Bore .080 inch MLS-5 Head Gasket

Cometic Gasket is well-known for making solid sealing solutions, and this Multi-Layer Steel (MLS) head gasket is a prime example. It’s built for GM LS Gen-3 and Gen-4 small block V8 engines, specifically those with a 3.910-inch bore. This gasket is designed to handle the demands of high-output engines, ensuring a reliable seal between your cylinder head and engine block without needing any extra sealants.

What makes this gasket stand out is its construction. It uses multiple layers of stainless steel for increased strength and resistance to corrosion, which helps it rebound and maintain its seal. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit and works well with different surface finishes. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses, with this particular gasket having a compressed operating thickness of 0.080 inches. This design makes it suitable for use with both aluminum-to-aluminum and aluminum-to-cast iron block configurations, as it can manage the shearing forces that can occur between dissimilar metals.

This gasket fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette, Chevrolet Silverado 1500, and GMC Sierra 1500. It's a well-built option for anyone rebuilding or working on the top end of their LS engine.