Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .040in MLS Cylinder Head Gasket - 4.450in Bore - LHS

This Cometic Multi-Layer Steel (MLS) head gasket is built with a specific design in mind: sealing the combustion chamber of your GM L18 Vortec 8100 Gen-VII Big Block V8 engine. It's designed with a 4.450-inch bore and is 0.040 inches thick, making it a precise fit for engines that have been machined or require a specific gasket thickness. The MLS construction uses multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion and maintain a seal even under high output conditions. This is important for engines that see a lot of work, whether it's towing or just everyday driving.

The outer layers of this gasket are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating is crucial for creating a tight seal against both aluminum and cast iron engine blocks, and it works well with aluminum heads too. The center layer is uncoated stainless steel and can be varied to meet different thickness needs, which is how this gasket achieves its 0.098-inch compressed operating thickness. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying the installation process.

This gasket is a solid option for a range of heavy-duty GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500. It's designed to handle the demands of these larger V8 engines, ensuring a reliable seal for your engine's top end.