Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .084in MLS Cylinder Head Gasket - 4.100in Bore - LHS

Cometic Gasket is well-known for making solid sealing solutions, and this Multi-Layer Steel (MLS) head gasket is a prime example. If you're working on a GM Duramax engine like the LB7, LLY, LBZ, LMM, LGH, or LML, this gasket is designed to handle the demands of those powerful engines. It's built to provide maximum sealing performance, especially important when you're rebuilding the top end or dealing with high output applications.

What makes this gasket stand out is its construction. It's made of multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C). This Viton coating is crucial for sealing effectively in harsh environments and on various surface finishes, whether you're mating aluminum heads to aluminum blocks or aluminum heads to cast iron blocks. The center layer is also stainless steel, and its thickness can be varied to meet different sealing requirements, with this particular gasket having a compressed thickness of 0.036 inches and a bore size of 4.100 inches.

This gasket fits a wide range of GM trucks and vans, including models like the Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, and Chevrolet Express 3500. It's designed to be a direct seal, meaning it doesn't require any additional sealants, simplifying installation.