Cometic GM LS1 SB 4.100in Bore .070in MLS-5 Head Gasket

This is a Cometic MLS-5 head gasket, designed for GM LS1, LS2, LS3, and LS6 Gen-3 and Gen-4 small block V8 engines. It features a 4.100 inch bore and a compressed thickness of 0.070 inches. This gasket is built to handle the demands of high-output engines, making it a solid choice for rebuilds or performance applications across a wide range of GM vehicles, including models like the Chevrolet Corvette, Cadillac CTS, and Chevrolet Silverado 1500.

Cometic's Multi-Layer Steel (MLS) design uses multiple layers of stainless steel for increased strength and resistance to corrosion. 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 harsh conditions. This construction means the gasket doesn't require any additional sealants and is suitable for mating aluminum heads to either aluminum or cast iron blocks, as it can manage the shearing forces between different metals.

The center layer of stainless steel can be varied to achieve different thicknesses, and in this case, it's set to provide a 0.070 inch compressed operating thickness. This specific design helps maintain proper compression ratios and sealing integrity for your LS engine.