What does the Viton coating do for this head gasket?

The Viton coating on both sides of the gasket helps create a more robust seal. Viton is known for its resistance to heat and oil, which are common in engine environments, contributing to the gasket's overall longevity and performance.

What is HP shim technology and why is it important?

HP shim technology refers to a design feature that increases the clamping force around the combustion chamber. This is particularly beneficial for open deck blocks, helping to ensure a tighter and more reliable seal under pressure.

Does this gasket come with any hardware?

This product includes the Cometic C5318-066 head gasket. It is recommended to consult the manufacturer's installation instructions for any additional hardware or specific requirements for your engine build.

Specifications

Brand: Cometic Gasket
Part #: C5318-066
UPC: 191070124069

Cometic GM LS1 SB 4.160 inch Bore .066 inch MLS Head Gasket

Name: Cometic GM LS1 SB 4.160 inch Bore .066 inch MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-ls1-sb-4-160-inch-bore-066-inch-mls-head-gasket-t14-419692
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 .066" MLS Head Gasket, 4.160" bore. Viton coated for a strong seal on open deck blocks.

Key Features

Fits many GM LS Gen-3/4 Small Block V8 engines.
4.160 inch bore size.
.066 inch gasket thickness.
Multi-Layer Steel (MLS) construction for durability.
HP shim technology increases clampload around the combustion chamber for improved sealing.
Coated on both sides with Viton for enhanced sealing and resistance to heat and oil.

⚠️ 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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Will it fit your car?

About this part

Product Details

If you're rebuilding the top end of a GM LS Gen-3 or Gen-4 small block V8, getting the head gasket right is crucial for a solid seal. This Multi-Layer Steel (MLS) gasket from Cometic is built for that job, featuring a 4.160-inch bore and a .066-inch thickness. It's designed to work with open deck block configurations, which are common in many LS engines.

What sets this gasket apart is its HP shim technology. This feature helps increase the clamping force around the combustion chamber, ensuring a tighter seal where it matters most. Plus, both sides of the gasket are coated with Viton, a high-performance material that stands up well to heat and oil, further improving its sealing capabilities. This well-built gasket fits a wide range of GM vehicles, from performance cars like the Chevrolet Camaro and Corvette to trucks and SUVs like the Chevrolet Silverado and Cadillac Escalade.