What is the compressed thickness of this head gasket?

When properly installed and compressed, this Cometic head gasket has an operating thickness of 0.036 inches. This is a key measurement for ensuring proper compression ratios and valve-to-piston clearance.

Does this gasket require any sealant?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance without the need for additional sealants. The multi-layer steel construction with Viton coating creates a reliable seal on its own.

What is the benefit of the Viton coating?

The Viton rubber coating on the outer layers of the gasket is heat resistant up to 482 degrees Fahrenheit. This material is chosen for its ability to meet the demands of harsh sealing environments, load conditions, and various surface finishes.

Specifications

Brand: Cometic Gasket
Part #: C5489-066
UPC: 191070058951

Cometic GM LS1 SB 4.100in Bore .066in MLS-5 Head Gasket

Name: Cometic GM LS1 SB 4.100in Bore .066in MLS-5 Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-sb-4-100in-bore-066in-mls-5-head-gasket-t14-194749
Price: 131.62 USD
Availability: BackOrder

$131.62

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Cometic GM LS1 SB MLS-5 head gasket with a 4.100in bore and .066in thickness. Built with multiple stainless steel layers and Viton coating for reliable sealing.

Key Features

Fits many GM LS Gen-3/4 Small Block V8 engines.
Multi-layer steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated on both sides with Viton, a heat-resistant elastomer up to 482 F.
Compressed operating thickness is 0.036 inches.
Bore size is 4.100 inches.
Requires no additional sealants 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

No-fit, no charge. Wrong part? Send it back, free return label.

Secure CheckoutFast Shipping631-982-0042

Will it fit your car?

About this part

Product Details

This Cometic Multi-Layer Steel (MLS) head gasket is built with five layers of stainless steel, featuring a Viton rubber coating on the outer layers. This construction is designed to handle the demands of high-output engines, providing a strong seal between aluminum heads and blocks, or aluminum heads and cast iron blocks. The Viton coating is heat resistant up to 482 degrees Fahrenheit, ensuring durability in harsh sealing environments.

The gasket has a compressed operating thickness of 0.036 inches and a bore size of 4.100 inches, making it suitable for a wide range of GM LS Gen-3 and Gen-4 small block V8 engines. Because it's a multi-layer steel design, it doesn't require additional sealants, simplifying installation. This gasket is a solid option for rebuilding or upgrading engines in vehicles like the Chevrolet Corvette, Cadillac CTS, and Chevrolet Silverado 1500.