What is the purpose of the Viton coating on this head gasket?

The Viton coating on the outer layers of this gasket is a heat-resistant elastomer. It's designed to handle high temperatures, up to 482°F (250°C), and meet the demands of harsh sealing environments, ensuring a reliable seal between the cylinder head and the engine block.

Do I need to use any sealant with this Cometic head gasket?

No, Cometic MLS head gaskets like this one are designed to provide maximum sealing performance without the need for additional sealants. The multi-layer steel construction and Viton coating create a robust seal on their own.

What does the 'MID Sleeves' designation mean for this gasket?

The 'MID Sleeves' refers to the inclusion of Darton MID Sleeves within the gasket design. These sleeves are integrated to enhance the gasket's sealing capabilities and structural integrity, particularly in high-performance applications.

Specifications

Brand: Cometic Gasket
Part #: C5790-040
UPC: 191070057251

Cometic GM LS1 (w/M.I.D. Sleeves) 4.165 inch Bore .040 inch MLS Head Gasket

Name: Cometic GM LS1 (w/M.I.D. Sleeves) 4.165 inch Bore .040 inch MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-w-m-i-d-sleeves-4-165-inch-bore-040-inch-mls-head--t14-279455
Price: 106.53 USD
Availability: BackOrder

$106.53

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Cometic GM LS1 MLS head gasket with Viton coating and Darton MID sleeves. Bore 4.165", thickness .040".

Key Features

Fits a wide range of GM LS Gen-3 and Gen-4 small block V8 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with Viton, a heat-resistant elastomer rated up to 482°F (250°C).
Compressed operating thickness is 0.040 inches.
Features a 4.165-inch bore size.
Includes Darton MID Sleeves for enhanced sealing.

⚠️ 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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About this part

Product Details

This Cometic Multi-Layer Steel (MLS) head gasket is built with a compressed operating thickness of 0.040 inches and features a 4.165-inch bore, specifically designed for GM LS Gen-3 and Gen-4 small block V8 engines. The outer layers are coated with Viton, a heat-resistant elastomer that can handle temperatures up to 482°F (250°C), ensuring a strong seal even in demanding conditions. This construction is ideal for mating aluminum heads to either aluminum or cast iron blocks, as it can manage the shearing forces that arise from dissimilar metals.

The MLS design itself offers increased strength and corrosion resistance due to its multiple stainless steel layers, which also allow the gasket to rebound effectively. The inclusion of Darton MID Sleeves further enhances its sealing capabilities. Because these gaskets are made from multiple layers of stainless steel and feature the Viton coating, they do not require any additional sealants, making installation more straightforward. This makes them a solid option for high-output engines where reliable sealing is critical.

This gasket fits a wide range of GM vehicles, including popular models like the Chevrolet Camaro, Corvette, and Pontiac GTO. Always refer to the manufacturer's installation instructions for specific details related to your application.