Cometic GM LS1 SB 4.100in Bore .075in MLS-5 Head Gasket

Cometic Gasket is well-known for making solid sealing solutions, and this MLS head gasket is a prime example of their work for GM LS engines. If you're rebuilding or repairing a Gen-3 or Gen-4 small block V8 like those found in a Chevrolet Corvette, Camaro, or Silverado, this gasket is designed to seal your combustion chambers effectively. It's built with a 4.100-inch bore and a 0.075-inch compressed thickness, making it suitable for a wide range of LS engine builds.

This gasket uses a Multi-Layer Steel (MLS) construction, which means it's made of several layers of stainless steel. This design offers increased strength and the ability to rebound, helping it resist corrosion and withstand the forces within high-output engines. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, ensuring a reliable seal even in demanding conditions. The center layer is stainless steel and can be varied to achieve different thicknesses, like the 0.075-inch specification on this particular gasket.

Because these are MLS gaskets, they don't require any additional sealants, which simplifies installation. They are designed to work well with various block and head material combinations, including aluminum heads on aluminum blocks or aluminum heads on cast iron blocks, and can handle the shearing forces that can occur between dissimilar metals.