What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic MLS head gasket is 0.040 inches. This measurement is achieved after the gasket has been properly installed and torqued down.

Does this gasket require any sealant?

No, Cometic MLS head gaskets are designed for maximum sealing performance and typically do not require any additional sealants. The multi-layer steel construction and Viton coating are intended to create a robust seal on their own.

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

Viton is a heat-resistant rubber material that can withstand high temperatures, up to 482 degrees Fahrenheit (250 C). It's used on the outer layers of this gasket to ensure a reliable seal in demanding engine conditions and on various surface finishes.

Specifications

Brand: Cometic Gasket
Part #: C5445-040
UPC: 191070022983

Cometic Chrysler Gen-2 Hemi .040in MLS Cylinder Head Gasket - 4.250in Bore

Name: Cometic Chrysler Gen-2 Hemi .040in MLS Cylinder Head Gasket - 4.250in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chrysler-gen-2-hemi-040in-mls-cylinder-head-gasket-4-250i-t14-807126
Price: 106.53 USD
Availability: BackOrder

$106.53

On Backorder

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

Cometic Chrysler Gen-2 Hemi .040in MLS Cylinder Head Gasket - 4.250in Bore. This multi-layer steel gasket offers improved sealing for high-output engines.

Key Features

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket.
It has a 4.250 inch bore diameter and a compressed operating thickness of 0.040 inches.
The gasket is constructed from multiple embossed layers of stainless steel for increased strength and corrosion resistance.
Outer layers are coated with Viton, a heat-resistant rubber material suitable for harsh sealing environments.
Designed for high-output engines, these MLS gaskets do not require additional sealants.
Suitable for use with aluminum heads to aluminum blocks and aluminum heads to 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

This product is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for Chrysler Gen-2 Hemi engines. You get one well-built gasket, featuring multiple embossed layers of stainless steel. The outer layers are coated with Viton, a heat-resistant rubber material, and the compressed operating thickness is 0.040 inches with a 4.250-inch bore diameter. This gasket fits a range of classic Mopar V8s, including models like the Dodge Challenger, Dodge Charger, and Plymouth Barracuda from the late 60s and early 70s.

Cometic MLS head gaskets are built to handle the demands of high-output engines. The multiple stainless steel layers provide increased strength and resistance to corrosion, while also allowing the gasket to rebound. The Viton coating on the outer layers is designed to seal effectively in harsh environments and on various surface finishes, making it suitable for both aluminum-to-aluminum and aluminum-to-cast iron block configurations. Because they are designed for maximum sealing, these gaskets typically do not require any additional sealants.