What is the compressed thickness of this head gasket?

The compressed operating thickness for this Cometic MLS head gasket is 0.036 inches. This is the thickness after the gasket has been properly torqued down.

Do I need to use any sealant with this head gasket?

No, Cometic Multi-Layer Steel (MLS) head gaskets are designed to provide maximum sealing performance on their own and do not require any additional sealants.

What is the purpose of the Viton coating on the outer layers?

The Viton rubber coating on the outer layers is heat resistant up to 482 degrees Fahrenheit. It's designed to handle demanding sealing environments, various load conditions, and different surface finishes for a reliable seal.

Specifications

Brand: Cometic Gasket
Part #: C5477-030

Cometic GM LS1 SB 4.000 inch Bore .030 inch MLS Head Gasket

Name: Cometic GM LS1 SB 4.000 inch Bore .030 inch MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-sb-4-000-inch-bore-030-inch-mls-head-gasket-t14-709646
Price: 97.74 USD
Availability: InStock

$97.74

Only 1 left in stock

Cometic GM LS1 SB .030 inch MLS head gasket with a 4.000 inch bore. Designed for high output engines.

Key Features

Fits many GM LS Gen-3/4 small block V8 engines.
Features a 4.000 inch bore and is 0.030 inch undersize.
Constructed with multiple embossed stainless steel layers for strength and corrosion resistance.
Outer layers are coated with heat-resistant Viton rubber (up to 482 F).
Center stainless steel layer allows for thickness adjustments.
Compressed operating thickness is 0.036 inches.

⚠️ 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 with multiple embossed stainless steel layers, featuring an outer coating of Viton rubber. The Viton coating is heat resistant up to 482 degrees Fahrenheit and handles tough sealing environments, load conditions, and various surface finishes. The center layer is stainless steel, allowing for adjustments in thickness to meet different needs. This gasket is specifically designed for GM LS Gen-3/4 small block V8 engines with a 4.000 inch bore and is 0.030 inches undersize.

MLS gaskets are a solid choice for high-output engines because they offer maximum sealing performance and don't require additional sealants. They work well with both aluminum and cast iron blocks, and can handle the shearing forces that arise when mating different metals. The multiple stainless steel layers provide increased strength and resistance to corrosion, while also allowing the gasket to rebound. This particular gasket has a compressed operating thickness of 0.036 inches.

This gasket fits a wide range of GM vehicles, including models like the Chevrolet Corvette, Cadillac CTS, and Buick LaCrosse. It's a well-built component for rebuilding or upgrading your LS engine.