Cometic GM LS1 SB 4.130 inch Bore .120 inch MLS Head Gasket

This is a Cometic Multi-Layer Steel (MLS) head gasket specifically designed for GM LS Gen-3 and Gen-4 small block V8 engines. It features a 4.130 inch bore and a compressed thickness of 0.120 inches, making it suitable for a wide range of applications, including vehicles like the Chevrolet Corvette, Cadillac CTS, and Chevrolet Silverado 1500. These gaskets are built to handle the demands of high-output engines and are constructed to provide a reliable seal without the need for additional sealants.

The construction of these MLS gaskets involves multiple layers of stainless steel, which gives them increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can withstand temperatures up to 482 degrees Fahrenheit and is designed to perform well in harsh sealing environments and on various surface finishes. The center layer is uncoated stainless steel and can be varied to achieve different thickness requirements, ensuring a precise fit for your engine build. This well-built design is ideal for sealing aluminum heads to aluminum blocks or aluminum heads to cast iron blocks, effectively managing the shearing forces that can occur between dissimilar metals.