Cometic GM LS1 SB 3.910 inch Bore .045 inch MLS Head Gasket

When you're rebuilding the top end of your GM LS engine, getting the cylinder head gaskets seated right is crucial for sealing combustion pressure and coolant. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of modern, high-output LS engines, whether you're working with aluminum heads on an aluminum block or aluminum heads on cast iron.

Cometic uses multiple layers of stainless steel for strength and rebound resistance, which helps prevent corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes without needing additional sealants. The specific thickness of this gasket is 0.045 inches when compressed, and it's designed for a 3.910-inch bore, making it a solid option for many GM LS1, LS2, LS3, and LS6 engines found in a wide range of vehicles from the late 90s through the mid-2010s.