What is the compressed thickness of this head gasket?

The compressed operating thickness for this Cometic MLS head gasket is 0.040 inches. This thickness is achieved through the design of the multi-layer steel construction.

Do I need to use sealant with this head gasket?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance and do not require any additional sealants. The Viton coating on the outer layers helps create a strong seal.

What types of engine blocks and heads is this gasket compatible with?

This gasket is ideal for combinations of aluminum heads with either aluminum blocks or cast iron blocks. The multi-layer steel construction can withstand the shearing forces created by these different material pairings.

Specifications

Brand: Cometic Gasket
Part #: C5270-040
UPC: 191070016418

Cometic Chevy Small Block 4.100 inch Bore .040 inch MLS Head Gasket (w/All Steam Holes)

Name: Cometic Chevy Small Block 4.100 inch Bore .040 inch MLS Head Gasket (w/All Steam Holes)
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-small-block-4-100-inch-bore-040-inch-mls-head-gaske-t14-4363758
Price: 97.74 USD
Availability: BackOrder

$97.74

On Backorder

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

Cometic Gasket is known for multi-layer steel head gaskets. This .040" MLS head gasket fits many Chevy Small Block V8 engines.

Key Features

Fits 56+ vehicle make/model combinations.
Cometic MLS (Multi-Layer Steel) head gaskets offer maximum sealing performance.
Constructed with multiple embossed layers of stainless steel for increased strength and corrosion resistance.
Outer layers are coated with Viton, a heat-resistant elastomer rated up to 482 F (250 C).
Designed for use with aluminum heads on aluminum or cast iron blocks.
Compressed operating thickness is 0.040 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

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

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About this part

Product Details

Cometic Gasket has built a reputation for making solid multi-layer steel (MLS) head gaskets that seal well in high-output engines. This particular gasket is built for Chevy Small Block V8 engines and features a 4.100 inch bore with a compressed thickness of .040 inches. It's designed to handle the demands of modern engines without needing any extra sealants.

The construction uses multiple layers of stainless steel for strength and corrosion resistance. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing conditions and different surface finishes, making it suitable for combinations of aluminum heads with either aluminum or cast iron blocks. The center layer is stainless steel and can be varied to achieve different thicknesses, like the .040 inch compressed thickness on this gasket.

This gasket fits a wide range of vehicles, including models like the Chevrolet C10, Camaro, and GMC C1500 from the 1980s. It's a well-built option for rebuilding or upgrading your engine.