Cometic Gasket Aluminum MLS Head Gasket

2005–2010 Chrysler 300C, 2006–2008 Dodge Magnum, 2006–2010 Dodge Charger, 2006–2010 Jeep Grand Cherokee, 2008–2010 Dodge Challenger 6.1L SRT8 HEMI

Part #: C5526-066

Overview

The Cometic Gasket Aluminum MLS Head Gasket is engineered specifically for high-performance Chrysler 6.1L Gen-3 HEMI engines found in select Chrysler, Dodge, and Jeep SRT8 models from 2005 to 2010. This premium multi-layer steel (MLS) gasket provides a reliable, durable seal that withstands the extreme pressures and temperatures of modern high-output engines. Designed as a direct replacement for factory gaskets, it ensures optimal engine efficiency and long-lasting performance without the need for additional sealants.

Ideal for performance enthusiasts, professional mechanics, and engine rebuilders, this gasket is built to handle the unique challenges of aluminum block and head combinations, maintaining a tight seal under thermal cycling and high-stress conditions.

Key Features

Cometic’s Aluminum MLS Head Gasket incorporates advanced materials and precision engineering to deliver superior sealing and durability. Key features include:

• Multi-layer stainless steel construction for enhanced strength and flexibility
• Embossed outer layers coated with Viton rubber for exceptional heat, oil, and chemical resistance
• Compressed operating thickness of 0.066 inches for precise sealing on 6.1L HEMI engines
• Designed to withstand temperatures up to 250°C (482°F) for reliable performance under extreme heat
• Compatible with aluminum sleeved blocks and maintains OEM bore dimensions (4.125-inch bore)
• Center shim layer of uncoated stainless steel to accommodate differential expansion between aluminum heads and blocks
• No sealants required, simplifying installation and reducing potential failure points
• Corrosion resistant and engineered to rebound under thermal cycling for long-lasting durability

Construction & Design

This head gasket features a robust multi-layer steel design combining multiple embossed stainless steel layers to provide both strength and flexibility. The embossed outer layers are coated with Viton, a high-performance fluorocarbon elastomer known for its superior resistance to heat, oil, and chemicals, ensuring a reliable seal in harsh engine environments.

The center shim layer is made from uncoated stainless steel, allowing the gasket to precisely accommodate the different expansion rates between aluminum heads and aluminum or cast iron blocks. This design minimizes the risk of gasket failure due to shearing forces and maintains a consistent, leak-free seal throughout the engine’s operating range.

Installation & Fitment

The Cometic Aluminum MLS Head Gasket is a direct factory replacement for the following vehicles equipped with the 6.1L SRT8 HEMI engine:

• 2005–2010 Chrysler 300C SRT8
• 2006–2008 Dodge Magnum SRT8
• 2006–2010 Dodge Charger SRT8
• 2006–2010 Jeep Grand Cherokee SRT8
• 2008–2010 Dodge Challenger SRT8

Installation follows standard head gasket replacement procedures and does not require additional sealants, simplifying the process and ensuring a clean, reliable seal. Proper surface preparation and adherence to manufacturer torque specifications are recommended to maximize gasket performance and longevity.

What's Included

• One Cometic Aluminum MLS Head Gasket (Part # C5526-066)

Ideal For

This gasket is perfect for performance enthusiasts, professional mechanics, and engine rebuilders working on Chrysler 6.1L Gen-3 HEMI engines in the specified SRT8 models. It is well-suited for those seeking a high-quality, durable MLS gasket that delivers superior sealing performance without the need for additional sealants, ensuring reliable engine operation under demanding conditions.