What is the benefit of Multi-Layer Steel (MLS) head gaskets?

MLS head gaskets are made of multiple stainless steel layers, which increases their strength and ability to rebound. This construction also helps them resist corrosion and provides a strong seal for high-output engines.

What is Viton coating and why is it used on this gasket?

Viton is a heat-resistant rubber material that coats the outer layers of the gasket. It's designed to handle demanding sealing environments, various load conditions, and different surface finishes, ensuring a reliable seal.

Specifications

Brand: Cometic Gasket
Part #: C5433-066
UPC: 191070126360

Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .066in MLS Cylinder Head Gasket - 4.570in Bore

Name: Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .066in MLS Cylinder Head Gasket - 4.570in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevrolet-mark-iv-gm-gen-v-vi-big-block-v8-066in-mls-cyli-t14-803734
Price: 141.79 USD
Availability: BackOrder

$141.79

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Cometic MLS head gasket for GM Mark-IV, Gen-V/VI Big Block V8 engines. Features a 4.570in bore and .066in compressed thickness for high-output builds.

Key Features

Fits a wide range of Chevrolet and GM Mark-IV, Gen-V/VI Big Block V8 vehicles.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Embossed outer layers are coated with heat-resistant Viton rubber for superior sealing.
Compressed operating thickness is 0.066 inches.
Bore size is 4.570 inches.
Designed for aftermarket heads with undersized water ports for customization.

⚠️ 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

If you're rebuilding the top end of a Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, getting the cylinder head gasket right is crucial for sealing power. This Multi-Layer Steel (MLS) gasket from Cometic is built for those high-output engines, offering a robust seal that doesn't require additional sealants. It's designed to handle the stresses between aluminum heads and either aluminum or cast iron blocks, thanks to its layered stainless steel construction.

The gasket has a compressed operating thickness of 0.066 inches and a bore size of 4.570 inches, making it suitable for aftermarket heads. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes. The center layer is stainless steel, and Cometic uses different thicknesses here to achieve the specific operating thickness. This construction not only adds strength but also helps the gasket rebound and resist corrosion.

This gasket is designed for aftermarket heads and features undersized water ports, allowing for customization during installation. It fits a wide range of vehicles, including models like the Chevrolet Impala, Corvette, and C10 Pickup from various years.