What is the compressed thickness of this head gasket?

When properly installed and compressed, this Cometic head gasket has an operating thickness of 0.098 inches. The initial thickness before compression is .051 inches.

Do I need to use any sealant with this gasket?

No, this Cometic MLS head gasket is designed to provide maximum sealing performance without the need for additional sealants. The Viton coating on the outer layers ensures a proper seal.

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

Viton is a type of synthetic rubber that is highly resistant to heat, rated up to 482 degrees Fahrenheit. It's used on the outer layers of this gasket to ensure a durable and effective seal in demanding engine conditions.

Specifications

Brand: Cometic Gasket
Part #: C5938-051
UPC: 191070144982

Cometic AMC 390/401 Gen-3 V8 .051in MLS Cylinder Head Gasket - 4.380in Bore

Name: Cometic AMC 390/401 Gen-3 V8 .051in MLS Cylinder Head Gasket - 4.380in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-amc-390-401-gen-3-v8-051in-mls-cylinder-head-gasket-4-380-t14-807058
Price: 111.49 USD
Availability: BackOrder

$111.49

On Backorder

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

Cometic AMC 390/401 Gen-3 V8 .051in MLS head gasket with a 4.380in bore. Built for high output engines.

Key Features

Fits a range of AMC and Jeep vehicles from the late 1960s through the late 1970s.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with Viton, a heat-resistant elastomer rated up to 482 F.
Designed for high-output engines and requires no additional sealants.
Suitable for use with aluminum heads on aluminum or cast iron blocks.
Features a 4.380-inch bore and a .051-inch compressed thickness.

⚠️ 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 an AMC 390 or 401 Gen-3 V8 engine, this Cometic Multi-Layer Steel (MLS) head gasket is built to handle the demands of a high-output powerplant. It's designed with a 4.380-inch bore and a thickness of .051 inches, making it a solid choice for rebuilding or upgrading these classic V8s found in vehicles like the American Motors AMX, Ambassador, and Jeep Wagoneer.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating is designed to seal effectively on various surface finishes and under different load conditions, and it means you won't need any extra sealants during installation. MLS gaskets are also well-suited for applications with both aluminum and cast iron blocks, as they can manage the shearing forces that can occur between different metals.