What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is 0.075 inches. This measurement is important for ensuring proper compression ratios and valve-to-piston clearance in your engine build.

Does this gasket require any sealant during installation?

No, this Multi-Layer Steel (MLS) head gasket is designed to provide maximum sealing performance without the need for any additional sealants. The Viton coating on the outer layers ensures a tight seal on its own.

What types of cylinder head and block materials is this gasket compatible with?

This gasket is designed to work effectively with both aluminum heads on aluminum blocks, and also with aluminum heads on cast iron blocks. The multi-layer steel construction can handle the shearing forces created by these different material combinations.

Specifications

Brand: Cometic Gasket
Part #: C5447-075
UPC: 191070126964

Cometic Chrysler 426 Hemi 4.56in Bore .075in MLS-5 Head Gasket

Name: Cometic Chrysler 426 Hemi 4.56in Bore .075in MLS-5 Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chrysler-426-hemi-4-56in-bore-075in-mls-5-head-gasket-t14-4338647
Price: 151.73 USD
Availability: BackOrder

$151.73

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 426 Hemi MLS head gasket. Built for high output engines, this gasket offers reliable sealing for your build.

Key Features

Fits a range of classic Chrysler 426 Hemi applications.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with heat-resistant Viton rubber for reliable sealing.
Compressed operating thickness is 0.075 inches.
Bore size is 4.56 inches, suitable for 426 Hemi engines.
No sealants are required for installation.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will it fit your car?

About this part

Product Details

If you're rebuilding a high-output Chrysler 426 Hemi engine, getting the sealing right on your cylinder heads is critical. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of these powerful engines, ensuring a solid seal between your block and heads.

This gasket is constructed from multiple layers of stainless steel, which gives it strength and the ability to rebound, helping it resist corrosion and maintain its seal over time. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, making it suitable for both aluminum-to-aluminum and aluminum-to-cast iron block configurations. With a compressed thickness of 0.075 inches and a bore size of 4.56 inches, it's designed to fit specific 426 Hemi applications. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying the installation process.

This gasket fits a range of classic Mopar vehicles from the late 60s and early 70s, including models like the Dodge Charger, Plymouth Barracuda, and Dodge Challenger. It's a well-built component designed for performance builds where reliable sealing is a top priority.