What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is 0.080 inches. This thickness is achieved through the center shim layer, which is part of the Multi-Layer Steel design.

Do I need to use sealant with this head gasket?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance and do not require additional sealants. The Viton coating on the outer layers ensures a reliable seal on its own.

What types of engine block and head materials is this gasket compatible with?

This MLS gasket is ideal for use with both aluminum heads to aluminum blocks, and aluminum heads to cast iron blocks. It is built to withstand the shearing forces created between these different materials.

Specifications

Brand: Cometic Gasket
Part #: C5817-080
UPC: 191070141196

Cometic GM Gen-V/VI Big Block V8 .080in MLS Cylinder Head Gasket - 4.320in Bore

Name: Cometic GM Gen-V/VI Big Block V8 .080in MLS Cylinder Head Gasket - 4.320in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-gen-v-vi-big-block-v8-080in-mls-cylinder-head-gasket-4-t14-806677
Price: 163.97 USD
Availability: BackOrder

$163.97

On Backorder

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Cometic GM Gen-V/VI Big Block V8 .080in MLS head gasket with a 4.320in bore. Built for high output engines, it seals reliably without sealants.

Key Features

Fits a wide range of 1991-1997 Chevrolet and GMC C/K/G/P/R/V series trucks and vans with GM Gen-V/VI Big Block V8 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with heat-resistant Viton for reliable sealing.
Compressed operating thickness is 0.080 inches.
Bore size is 4.320 inches.
Designed for high-output engines and requires no additional sealants.

⚠️ 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 is a Cometic Multi-Layer Steel (MLS) head gasket designed for GM Gen-V/VI Big Block V8 engines. It features a bore size of 4.320 inches and a compressed thickness of 0.080 inches, making it suitable for a range of Chevrolet and GMC trucks and vans from the early 90s through the mid-90s, like the C1500, K2500 Suburban, and G30 models.

MLS head gaskets are built with multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers of this gasket are embossed and coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes. This construction means the gasket seals effectively without needing additional sealants, and it's well-suited for combinations of aluminum heads with either aluminum or cast iron blocks, as it can manage the stresses between different metals.

The center layer is stainless steel and can be varied to achieve different thicknesses, which is how this gasket achieves its 0.080-inch compressed thickness. This design helps ensure a solid seal for high-output engines.