What is the advantage of a Multi-Layer Steel (MLS) head gasket?

MLS head gaskets are made of multiple stainless steel layers, which gives them increased strength and better resistance to corrosion compared to single-layer gaskets. They are also designed to rebound and handle the shearing forces between different block and head materials, like aluminum and cast iron.

Do I need to use sealant with this Cometic head gasket?

No, this Cometic MLS head gasket is designed to provide maximum sealing performance without the need for any additional sealants. The Viton coating on the outer layers helps create a reliable seal on its own.

What is the significance of the Viton coating on the gasket?

Viton is a heat-resistant rubber material that can withstand high temperatures, up to 482°F. This coating helps the gasket maintain its sealing integrity in demanding engine conditions and is effective on various surface finishes.

Specifications

Brand: Cometic Gasket
Part #: C5454-040
UPC: 191070034337

Cometic Chrysler 426/572 4.280in Bore .040in MLS Head Gasket

Name: Cometic Chrysler 426/572 4.280in Bore .040in MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chrysler-426-572-4-280in-bore-040in-mls-head-gasket-t14-460570
Price: 106.53 USD
Availability: BackOrder

$106.53

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Cometic Chrysler 426/572 .040in MLS head gasket. 4.280in bore, Viton coated stainless steel for high output engines.

Key Features

Fits 1970-1971 Dodge Challenger, 1966-1971 Dodge Charger, 1968-1971 Plymouth Barracuda, and many other Mopar vehicles.
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.
Features a 4.280 inch bore diameter, suitable for 426/572 Hemi engines.
Compressed operating thickness is 0.040 inches.
Designed for use with aluminum heads on aluminum 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 rebuilding the top end of a classic Mopar big block, like a Chrysler 426 or 572 Hemi, getting the head gasket right is crucial for sealing power. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of these high-output engines. It's designed to provide a solid seal between your cylinder head and block, which is essential for proper compression and preventing leaks.

This gasket is constructed from multiple layers of stainless steel, giving it increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F and works well with different surface finishes on aluminum or cast iron blocks. The compressed thickness is set at 0.040 inches, which is a common spec for these engines, and it's designed to work without needing any additional sealants. This makes installation straightforward, especially when mating aluminum heads to either aluminum or cast iron blocks, as the MLS design helps manage the stresses between dissimilar metals.

This gasket fits a range of popular Mopar vehicles from the late 60s and early 70s, including models like the Dodge Charger, Dodge Challenger, and Plymouth Barracuda. It's a well-built component that helps ensure your engine rebuild is sealed up tight and ready to perform.