What is the primary benefit of using a Multi-Layer Steel (MLS) head gasket?

MLS head gaskets, like this Cometic C5645-066, are built with multiple layers of stainless steel. This construction provides increased strength and resilience, helping them to better handle the high pressures and temperatures found in performance engines compared to older gasket designs.

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

No, these Cometic MLS head gaskets are designed to be installed without any additional sealants. The Viton coating on the outer layers provides the necessary sealing properties directly against the cylinder head and block surfaces.

What is the significance of the Viton coating on the outer layers?

Viton is a heat-resistant synthetic rubber material that can withstand high temperatures and harsh sealing environments. The coating on the outer layers of this gasket helps ensure a robust seal against the cylinder head and block, even under demanding operating conditions.

Specifications

Brand: Cometic Gasket
Part #: C5645-066
UPC: 191070136413

Cometic 92-96 GM LT1 Small Block 4.040 inch Bore .066 inch MLS-5 Head Gasket (w/Valve Pockets)

Name: Cometic 92-96 GM LT1 Small Block 4.040 inch Bore .066 inch MLS-5 Head Gasket (w/Valve Pockets)
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-92-96-gm-lt1-small-block-4-040-inch-bore-066-inch-mls-5-h-t14-279477
Price: 131.62 USD
Availability: BackOrder

$131.62

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Cometic C5645-066 MLS head gasket for 92-96 GM LT1/LT4 engines. Features a 4.040" bore and .066" thickness for reliable sealing.

Key Features

Fits 1992-1996 GM LT1/LT4 Gen-2 Small Block V8 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Features a 4.040 inch bore size.
Compressed operating thickness is 0.066 inches.
Outer layers are coated with heat-resistant Viton rubber for reliable sealing.
Designed for use with aluminum heads to aluminum blocks or cast iron blocks.

⚠️ 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

If you're working on a 1992-1996 GM LT1 or LT4 small block V8, these Cometic Multi-Layer Steel (MLS) head gaskets are a solid choice for sealing your cylinders. They're built for engines with a 4.040 inch bore and have a compressed thickness of 0.066 inches, designed to handle the demands of these performance-oriented engines.

Cometic builds these gaskets with multiple layers of stainless steel, which gives them strength and helps them resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and different surface finishes on your cylinder heads and block. This construction means they don't require any extra sealants and are suitable for use with both aluminum and cast iron blocks, helping to manage the forces that can arise when different metals are joined.

These gaskets are a popular option for rebuilding or refreshing the top end of these GM V8s, including applications like the Chevrolet Corvette, Camaro, and Pontiac Firebird from the mid-90s. They offer a well-built sealing solution that's ready for the job.