What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic MLS head gasket is .062 inches. This measurement is crucial for ensuring proper compression ratios and valve-to-piston clearance after installation.

Do I need to use any sealant with this gasket?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance on their own and do not require any additional sealants. The Viton coating on the outer layers ensures a tight seal against the block and head surfaces.

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

Viton is a high-performance, heat-resistant synthetic rubber material. It's used on the outer layers of this gasket because it can withstand extreme temperatures (up to 482°F) and harsh sealing environments, ensuring a durable and reliable seal for high-output engines.

Specifications

Brand: Cometic Gasket
Part #: C5816-062
UPC: 191070032432

Cometic Chevy BB Gen IV 4.320in Bore .062 inch MLS-5 396/402/427/454 Head Gasket

Name: Cometic Chevy BB Gen IV 4.320in Bore .062 inch MLS-5 396/402/427/454 Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-bb-gen-iv-4-320in-bore-062-inch-mls-5-396-402-427-4-t14-309811
Price: 152.35 USD
Availability: BackOrder

$152.35

On Backorder

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Cometic Chevy BB Gen IV MLS head gasket with a 4.320in bore and .062in compressed thickness. Built for high output engines.

Key Features

Fits a wide range of Chevrolet Big Block Gen IV engines.
Features a 4.320 inch bore and a .062 inch compressed thickness.
Constructed from multiple layers of stainless steel for increased strength and rebound.
Outer layers are embossed and coated with heat-resistant Viton rubber.
Designed for maximum sealing performance in high-output engines.
No additional sealants are required for installation.

⚠️ 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

Starting with a .062 inch compressed thickness, this Cometic Multi-Layer Steel (MLS) head gasket is built for serious performance. It's designed specifically for Chevrolet Big Block Gen IV engines with a 4.320 inch bore, making it a solid choice for rebuilding or upgrading your engine's top end. The multi-layer steel construction offers increased strength and the ability to rebound, which helps it maintain a seal under high stress.

What really sets this gasket apart is its construction. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating, combined with the embossed stainless steel layers, ensures a maximum seal for high-output engines without needing any additional sealants. It works well whether you're mating aluminum heads to an aluminum block or aluminum heads to a cast iron block, as it can handle the shearing forces that can occur between different metals.

This gasket fits a wide range of Chevrolet vehicles from the mid-60s through the early 90s, including popular models like the C10 Suburban, Impala, and Corvette. It's a well-built component designed to provide reliable sealing for demanding applications.