What is the compressed thickness of this head gasket?

The compressed operating thickness for this Cometic MLS head gasket is .098 inches. This measurement is important for ensuring proper compression ratios and valve-to-piston clearance after installation.

Do I need to use any sealant with this gasket?

No, Cometic MLS head gaskets are designed to provide a maximum seal without the need for additional sealants. The multi-layer steel construction and Viton coating create a robust seal on their own.

What is Viton and why is it used on this gasket?

Viton is a heat-resistant synthetic rubber material that can withstand high temperatures, up to 482 degrees Fahrenheit. It's used on the outer layers of this gasket to ensure a reliable seal in demanding engine conditions and harsh environments.

Specifications

Brand: Cometic Gasket
Part #: C5937-052
UPC: 191070408961

Cometic AMC 390/401 Gen-3 V8 .052in MLS Cylinder Head Gasket - 4.250in Bore

Name: Cometic AMC 390/401 Gen-3 V8 .052in MLS Cylinder Head Gasket - 4.250in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-amc-390-401-gen-3-v8-052in-mls-cylinder-head-gasket-4-250-t14-807048
Price: 151.73 USD
Availability: BackOrder

$151.73

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Cometic AMC 390/401 Gen-3 V8 MLS head gasket. 4.250in bore, .052in thickness. Built for high output engines.

Key Features

Fits AMC 390, 401 Gen-3 V8 engines with a 4.250 inch bore.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Viton rubber coating on outer layers provides excellent heat resistance up to 482 F.
Designed for high-output engines and requires no additional sealants.
Suitable for mating aluminum heads to aluminum blocks or aluminum heads to cast iron blocks.
Compressed operating thickness is .098 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

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About this part

Product Details

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for AMC 390, 401 Gen-3 V8 engines with a 4.250 inch bore. It has a compressed thickness of .052 inches. This gasket is built to handle the demands of high-output engines, offering a strong seal without needing additional sealants.

Cometic MLS gaskets are constructed from multiple layers of stainless steel, which gives them increased 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 temperatures up to 482 degrees Fahrenheit and works well in harsh sealing environments. This construction makes them suitable for use with both aluminum and cast iron blocks, and they can manage the shearing forces that can occur between different metal types.

This gasket fits a range of vehicles including the American Motors AMX, Ambassador, and Jeep Cherokee. It's a well-built option for rebuilding or upgrading your AMC V8 engine.