What is the compressed thickness of this head gasket?

This Cometic MLS head gasket has a compressed operating thickness of .060 inches. This measurement is important for ensuring proper piston-to-valve clearance and compression ratio after installation.

Do I need to use sealant with these Cometic MLS head gaskets?

No, Cometic Multi-Layer Steel (MLS) head gaskets are designed to provide maximum sealing performance without the need for additional sealants. The Viton coating on the outer layers ensures a tight seal against the head and block surfaces.

What does 'undersized water ports' mean for installation?

The undersized water ports are a feature for aftermarket heads. It means you'll need to enlarge or port-match these openings to align perfectly with the water passages in your specific cylinder heads and engine block during installation.

Specifications

Brand: Cometic Gasket
Part #: C5403-060
UPC: 191070028367

Cometic Chevrolet Gen-1 Small Block V8 .060in MLS Cylinder Head Gasket - 4.200in Bore

Name: Cometic Chevrolet Gen-1 Small Block V8 .060in MLS Cylinder Head Gasket - 4.200in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevrolet-gen-1-small-block-v8-060in-mls-cylinder-head-ga-t14-805608
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 Chevrolet Gen-1 Small Block V8 MLS head gasket. .060in compressed thickness, 4.200in bore. Direct fit.

Key Features

Fits 56+ vehicle combinations including Chevrolet C10 and GMC C1500.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Embossed outer layers are coated with heat-resistant Viton rubber for a reliable seal.
Compressed operating thickness is .060 inches.
Bore diameter is 4.200 inches.
Designed for aftermarket heads with undersized water ports for customization.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will it fit your car?

About this part

Product Details

When you're rebuilding the top end of your Chevrolet Gen-1 Small Block V8, getting the head gaskets right is crucial for a solid seal. This Cometic Multi-Layer Steel (MLS) gasket is built for that job, offering a compressed thickness of .060 inches and a 4.200-inch bore diameter, designed to work with aftermarket heads.

These MLS gaskets are constructed from multiple layers of stainless steel, which gives them strength and the ability to rebound, helping them resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing conditions and various surface finishes without needing additional sealants. The center layer is stainless steel, and its thickness can be varied to meet different requirements, like the .060 inch compressed thickness here. This design makes them suitable for sealing aluminum heads to either aluminum or cast iron blocks, as they can manage the shearing forces that can occur between different metals.

The water ports on this particular gasket are undersized, which is a common feature for aftermarket heads, allowing you to customize them to your specific setup. This gasket fits a wide range of Chevrolet and GMC trucks, cars, and SUVs from the early to mid-1980s, including models like the Chevrolet C10 and GMC C1500.