What is Multi-Layer Steel (MLS) construction?

Multi-Layer Steel (MLS) construction means the gasket is made of several layers of stainless steel. This design provides increased strength, better rebound characteristics, and resistance to corrosion, making it suitable for high-output engines.

Does this gasket require any sealant?

No, this Cometic MLS gasket is designed to seal effectively without the need for additional sealants. The Viton coating on the outer layers helps create a tight seal even on surfaces that aren't perfectly flat.

What are the port dimensions for this gasket?

The port dimensions for this exhaust manifold gasket are 2.082 inches in width and 1.508 inches in height. This ensures it matches the exhaust port size on compatible GM Duramax engines.

Cometic GM LB7/LBZ/LGH/LLY/LML/LMM Duramax .040in MLS Exhaust Manifold Gasket

Specifications

Brand: Cometic Gasket
Part #: C15042-040
UPC: 191070544003

Cometic GM LB7/LBZ/LGH/LLY/LML/LMM Duramax .040in MLS Exhaust Manifold Gasket

Name: Cometic GM LB7/LBZ/LGH/LLY/LML/LMM Duramax .040in MLS Exhaust Manifold Gasket
Brand: Cometic Gasket
Price: 57.06 USD
Availability: InStock

$57.06

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Cometic GM Duramax .040in MLS Exhaust Manifold Gasket. Multi-layer steel construction resists corrosion and high heat.

Key Features

Fits 2001-2016 Chevrolet and GMC Duramax trucks.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Viton coating on outer layers handles temperatures up to 482°F (250°C).
Center shim layer is uncoated stainless steel for durability.
No sealants required, designed to seal less-than-perfect surfaces.
Port dimensions are 2.082" x 1.508".

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This Cometic Multi-Layer Steel (MLS) exhaust manifold gasket is built with multiple layers of stainless steel, giving it increased strength and the ability to rebound and resist corrosion. The outer layers are coated on both sides with Viton, a heat-resistant elastomer that can handle temperatures up to 482°F (250°C) and meet the demands of harsh sealing environments. This gasket is designed to fit a range of GM Duramax trucks, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD.

The center shim layer is uncoated stainless steel and can be varied to accommodate different thickness requirements, with this specific gasket measuring .040 inches thick. The MLS design is ideal for sealing less-than-perfect surfaces without needing additional sealants, making installation more straightforward. The port dimensions are 2.082 inches by 1.508 inches, ensuring a proper match for the exhaust manifold ports on compatible Duramax engines.