What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is .036 inches. This is the measurement after the gasket has been installed and torqued to specification.

Can I use this gasket with different head and block materials?

Yes, this MLS gasket is designed to work effectively with both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks. The multi-layer steel construction helps manage the stresses between dissimilar materials.

Does this gasket require any special installation procedures or sealants?

No, Cometic MLS head gaskets are designed for maximum sealing performance and do not require additional sealants. Always refer to the manufacturer's installation instructions for proper torque specifications and sequence.

Specifications

Brand: Cometic Gasket
Part #: C5817-056
UPC: 191070141141

Cometic GM Gen-V/VI Big Block V8 .056in MLS Cylinder Head Gasket - 4.320in Bore

Name: Cometic GM Gen-V/VI Big Block V8 .056in MLS Cylinder Head Gasket - 4.320in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-gen-v-vi-big-block-v8-056in-mls-cylinder-head-gasket-4-t14-806672
Price: 152.35 USD
Availability: BackOrder

$152.35

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Cometic GM Gen-V/VI Big Block V8 .056in MLS Cylinder Head Gasket - 4.320in Bore. Multi-layer steel construction for high-output engines.

Key Features

This product is a Cometic GM Gen-V/VI Big Block V8 .056in MLS Cylinder Head Gasket with a 4.320in bore.
It is constructed from multiple layers of stainless steel for increased strength and corrosion resistance.
The outer layers are embossed and coated with Viton, a heat-resistant rubber material.
The compressed operating thickness of this gasket is .036 inches.
This gasket is designed to provide maximum sealing performance for high-output engines.
It can be used with both aluminum heads to aluminum blocks and aluminum heads to 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

When you're rebuilding the top end of your GM Gen-V/VI Big Block V8, you need a head gasket that can handle the pressure. This Cometic Multi-Layer Steel (MLS) gasket is built for that job. It's designed to seal effectively between aluminum heads and cast iron blocks, or even aluminum to aluminum, without needing extra sealants. The multiple stainless steel layers give it strength and help it resist corrosion, while the outer layers are coated with Viton, a heat-resistant rubber that can handle tough sealing environments up to 482 degrees Fahrenheit.

This gasket has a compressed thickness of .036 inches and a bore size of 4.320 inches, making it suitable for a range of GM Big Block V8 applications from the early 90s, like the Chevrolet C1500 or GMC K2500. The layered stainless steel construction not only adds strength but also allows the gasket to rebound and maintain a solid seal, even under the stress of high-output engines. The Viton coating on the outer layers is specifically chosen for its ability to withstand high temperatures and harsh conditions, ensuring a reliable seal.