What is the bore size and thickness of this head gasket?

This Cometic head gasket is designed for engines with a 4.130 inch bore. It has a thickness of .066 inches, which is a common specification for many LS engine builds.

What does the Viton coating on the outer layers do?

The Viton coating on the embossed outer layers helps the gasket create a more reliable seal against the cylinder head and block surfaces. It aids in conforming to imperfections and resisting blow-by and leaks under pressure.

Does this gasket come with any hardware or other components?

This product listing is for one Cometic Multi-Layer Steel (MLS) head gasket only. It does not include head bolts or any other installation hardware.

Specifications

Brand: Cometic Gasket
Part #: C5317-066
UPC: 191070123994

Cometic GM LS1 SB 4.130 inch Bore .066 inch MLS Head Gasket

Name: Cometic GM LS1 SB 4.130 inch Bore .066 inch MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-sb-4-130-inch-bore-066-inch-mls-head-gasket-t14-546896
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 4.130 inch Bore .066 inch MLS Head Gasket. Features Viton coated outer layers for a reliable seal.

Key Features

This package contains one Cometic Multi-Layer Steel (MLS) head gasket.
Designed for GM LS Gen-3 and Gen-4 small block V8 engines.
Features a 4.130 inch bore size.
Has a thickness of .066 inches.
Embossed outer layers are coated with Viton for improved sealing.
Fits a wide range of GM vehicles including Chevrolet, Buick, and Cadillac models.

⚠️ 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 LS Gen-3 or Gen-4 small block V8, a solid head gasket is crucial. This Multi-Layer Steel (MLS) gasket from Cometic is built for engines with a 4.130-inch bore and a thickness of .066 inches, designed to handle the demands of these popular V8s. You get one head gasket in this package, ready to seal the combustion chamber and coolant passages.

The outer layers of this gasket are embossed and coated with Viton, a high-performance fluoroelastomer. This coating helps the gasket conform to the cylinder head and block surfaces, creating a strong seal that resists blow-by and coolant leaks, even under higher pressures. MLS construction itself offers a robust barrier, making it a popular choice for many LS engine builds.

This gasket fits a wide range of GM vehicles, including models like the Chevrolet Corvette, Camaro, and Silverado. Always double-check the fitment guide to ensure it's the right choice for your specific application.