Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .045in MLS Cylinder Head Gasket - 4.280in Bore - RHS

Cometic Gasket is known for making well-built sealing solutions, and this Multi-Layer Steel (MLS) head gasket is a prime example. It’s built for the GM L18 Vortec 8100 Gen-VII Big Block V8 engine, specifically designed to handle the demands of high-output applications. This gasket has a compressed operating thickness of 0.045 inches and a bore size of 4.280 inches, making it a precise fit for the right side of your engine.

What makes this gasket stand out is its construction. It’s made from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This advanced coating ensures a strong seal even in harsh conditions, and because it’s an MLS gasket, it doesn't require any additional sealants, simplifying installation. These gaskets are a solid option whether you're mating aluminum heads to an aluminum block or aluminum heads to a cast iron block, as they can manage the shearing forces that arise from different materials.

This gasket fits a range of heavy-duty GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Yukon XL 2500. It's a well-made component designed to provide reliable sealing for your Vortec big block engine.