What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is 0.040 inches. This measurement is crucial for ensuring proper cylinder head to block sealing and compression ratios.

Does this gasket require any sealant?

No, this Cometic MLS head gasket is designed with an embossed and Viton-coated outer layer that provides a complete seal without the need for additional sealants. It's ready to install right out of the box.

What does 'with M.I.D. Sleeves' mean for this gasket?

The 'with M.I.D. Sleeves' designation means this gasket is specifically designed to be used in conjunction with Darton MID sleeves. This ensures proper sealing and compatibility within the engine block.

Specifications

Brand: Cometic Gasket
Part #: C5789-040
UPC: 191070021559

Cometic GM LS1 (w/M.I.D. Sleeves) 4.125 inch Bore .040 inch MLS Head Gasket

Name: Cometic GM LS1 (w/M.I.D. Sleeves) 4.125 inch Bore .040 inch MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-w-m-i-d-sleeves-4-125-inch-bore-040-inch-mls-head--t14-279451
Price: 106.53 USD
Availability: BackOrder

$106.53

On Backorder

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Cometic GM LS1/LS2/LS3/LS6 .040 inch MLS head gasket with Darton MID Sleeves. Bore 4.125".

Key Features

Fits 11+ vehicle make/model combinations including Chevrolet Camaro, Corvette, and Pontiac GTO.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with heat-resistant Viton for a reliable seal.
Compressed operating thickness is 0.040 inches.
Designed with a 4.125 inch bore and includes Darton MID Sleeves.
Suitable for aluminum heads with aluminum or cast iron blocks.

⚠️ 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 for GM LS Gen-3 and Gen-4 small block V8 engines. It features a 4.125 inch bore and a compressed thickness of 0.040 inches, specifically designed to work with Darton MID Sleeves. This gasket is a well-built option for high-output engines, suitable for applications using aluminum heads with either aluminum or cast iron blocks, as it can handle the shearing forces between different metals.

The gasket is constructed from multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are embossed and coated on both sides with Viton, a heat-resistant rubber material rated up to 482°F (250°C), ensuring a strong seal in demanding conditions. The center layer is uncoated stainless steel, allowing for precise thickness control. Because it's an MLS gasket with Viton coating, it doesn't require any additional sealants.