Cometic Gasket MLS Cylinder Head Gasket

2005–2010 Chrysler 300C, 2006–2010 Dodge Charger, 2008–2010 Dodge Challenger, 2006–2008 Dodge Magnum, 2006–2010 Jeep Grand Cherokee 6.1L Gen-3 Hemi

Part #: C5890-066

Overview

The Cometic Gasket MLS (Multi-Layer Steel) Cylinder Head Gasket is a premium sealing solution engineered specifically for Chrysler 6.1L Gen-3 Hemi engines. Designed to meet the rigorous demands of high-performance and high-output applications, this gasket ensures a reliable, leak-free seal under extreme combustion pressures and thermal cycling. It is an ideal upgrade for enthusiasts, professional mechanics, and performance builders who require durable head gaskets for muscle cars, performance sedans, and SUVs.

Compatible with a broad range of vehicles including the Chrysler 300C, Dodge Charger, Dodge Challenger, Dodge Magnum, and Jeep Grand Cherokee from model years 2005 through 2010, this gasket delivers consistent sealing performance without the need for additional sealants or adhesives.

Key Features

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

• Multiple embossed layers of stainless steel for enhanced strength and durability
• Outer layers coated with Viton rubber, a heat-resistant elastomer rated up to 250°C (482°F)
• Compressed operating thickness of 0.036 inches for precise and consistent sealing
• Embossed outer layers that improve sealing against combustion pressures and prevent leaks
• Center shim layer of uncoated stainless steel, allowing for customizable thickness adjustments
• Corrosion-resistant construction designed to withstand thermal cycling and mechanical stress
• Compatible with aluminum-to-aluminum and aluminum-to-cast iron engine configurations
• No additional sealants or adhesives required during installation
• Specifically engineered for Chrysler 6.1L Gen-3 Hemi engines with a 4.250-inch bore

Construction & Design

The Cometic MLS Cylinder Head Gasket is constructed from multiple layers of high-grade stainless steel, providing exceptional strength, flexibility, and longevity. The outer layers are embossed to create a superior sealing surface and coated with Viton rubber, a premium compound known for its excellent heat resistance and chemical durability. This ensures a reliable seal even under extreme operating conditions.

The center shim layer is made of uncoated stainless steel, enabling precise thickness adjustments to accommodate specific engine tolerances. This multi-layer design effectively absorbs and rebounds from the shearing forces generated between dissimilar materials such as aluminum heads and cast iron blocks, preventing gasket failure and maintaining a consistent seal over time.

Installation & Fitment

This MLS cylinder head gasket is designed for direct fitment on Chrysler 6.1L Gen-3 Hemi-powered vehicles without requiring any modifications. Installation follows standard head gasket replacement procedures, and no additional sealants or adhesives are necessary. Proper surface preparation and adherence to manufacturer torque specifications are essential to ensure optimal sealing performance and long-term durability.

Compatible vehicles include:

• Chrysler 300 Base (2005–2007), 300 C (2005–2010), 300 C SRT8 (2005–2010), 300 Limited (2005–2010), 300 LX (2008–2009), 300 S (2010), 300 Signature Series (2009), 300 Touring (2005–2010)
• Dodge Challenger R/T (2009–2010), SE (2009–2010), SRT8 (2008–2010)
• Dodge Charger Base (2006–2007), Daytona R/T (2006), Pursuit (2006–2010), R/T (2006–2010), SE (2006–2010), SRT8 (2006–2010), SXT (2006–2010)
• Dodge Magnum R/T (2006–2008), SE (2006–2008), SRT8 (2006–2008), SXT (2006–2008)
• Jeep Grand Cherokee 65th Anniversary Edition (2006), Laredo (2006–2010), Limited (2006–2010), Overland (2006–2009), SRT8 (2006–2010)

What's Included

• One Cometic MLS Cylinder Head Gasket (Part Number C5890-066)

Ideal For

This gasket is ideal for automotive enthusiasts, professional mechanics, and performance builders who demand a reliable, high-quality sealing solution for Chrysler 6.1L Gen-3 Hemi engines. It is especially suited for those upgrading or maintaining muscle cars, performance sedans, and SUVs that require durable head gaskets capable of handling elevated combustion pressures and thermal cycling.

Cometic Gasket supplies high-performance sealing solutions for motorsports and high-stress engine builds, with a strong focus on modern gasket materials like multi-layer steel (MLS) head gaskets. Their catalog spans head gaskets and complete gasket sets across a wide range of applications, helping builders maintain reliable combustion and fluid sealing under extreme pressure and heat.