Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .140in 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. It’s built for GM Duramax engines like the LB7, LLY, LBZ, LMM, LGH, and LML, fitting a wide range of trucks and vans including the Chevrolet Silverado 2500 HD and GMC Savana 3500. This gasket is designed to handle the demands of high-output engines, ensuring a strong seal between your cylinder head and engine block without needing extra sealants.

What makes this gasket stand out is its construction. It uses multiple layers of stainless steel, which gives it 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 tough sealing conditions and various surface finishes. The center layer is also stainless steel and can be varied in thickness, which is how Cometic achieves the specific .140 inch compressed thickness on this particular gasket, paired with a 4.100 inch bore size. This design is effective for sealing between aluminum heads and either aluminum or cast iron blocks.