Cometic Gasket MLS Head Gasket

2011–2019 Chrysler / Dodge / Jeep / Ram 6.4L Gen-3 Hemi

Part #: C5027-120

Overview

The Cometic Gasket MLS Cylinder Head Gasket is engineered for high-performance and heavy-duty applications in Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.4L Gen-3 Hemi engine. Designed specifically for the left-hand side (LHS) of the cylinder head, this gasket provides a precise fit and superior sealing to maintain engine integrity under extreme conditions. Whether you are performing a rebuild, upgrade, or replacement, this gasket delivers OEM-level quality with enhanced durability to meet the demands of modern high-output engines.

Ideal for enthusiasts and professional engine builders alike, the Cometic MLS head gasket ensures reliable sealing performance, preventing leaks and withstanding the thermal and mechanical stresses common in performance and heavy-duty use.

Key Features

Cometic’s MLS Cylinder Head Gasket incorporates advanced materials and design features to provide exceptional strength and durability for demanding engine environments. Key features include:

• Multi-Layer Steel (MLS) construction for superior strength and long-lasting durability
• Embossed stainless steel layers that enhance sealing and resist deformation
• Viton rubber coating on outer layers for excellent heat resistance up to 250°C (482°F)
• Compressed operating thickness of 0.036" for precise sealing and optimal fitment
• Compatible with aluminum cylinder heads mated to aluminum or cast iron blocks, resisting shearing forces
• Corrosion-resistant materials to ensure reliable performance over time
• No sealants required, simplifying installation and reducing maintenance
• Engineered to withstand harsh sealing environments and varying surface finishes
• Designed specifically for the left-hand side of the cylinder head on 6.4L Gen-3 Hemi engines

Construction & Design

This head gasket features a sophisticated multi-layer steel design composed of several embossed stainless steel layers. The outer layers are coated with Viton, a high-performance fluorocarbon elastomer known for exceptional heat resistance and chemical durability. This coating enhances the gasket’s ability to maintain a tight seal under extreme thermal and mechanical stress.

The center shim layer is uncoated stainless steel, allowing precise thickness control to meet specific engine requirements. This layered construction provides flexibility to accommodate differential expansion rates between aluminum heads and cast iron or aluminum blocks, maintaining sealing integrity and preventing leaks.

Installation & Fitment

The Cometic MLS Cylinder Head Gasket is designed for direct fitment on the left-hand side of compatible 6.4L Gen-3 Hemi engines, ensuring a straightforward installation process without the need for additional sealants. It fits a broad range of vehicles, including:

• 2011–2019 Dodge Challenger 6.4L 392
• 2012–2019 Dodge Charger 6.4L 392
• 2018–2019 Dodge Durango 6.4L 392
• 2012–2014 Chrysler 300 6.4L 392
• 2012–2014 Jeep Grand Cherokee 6.4L SRT8
• 2015–2019 Jeep Grand Cherokee 6.4L SRT
• 2014–2018 Ram 1500, 2500, 3500 6.4L 392

Installation follows standard head gasket replacement procedures with no modifications required, making it suitable for professional mechanics and experienced enthusiasts performing engine rebuilds or performance upgrades.

What's Included

• One Cometic MLS Cylinder Head Gasket (Left-Hand Side)

Ideal For

This gasket is perfect for performance enthusiasts, professional engine builders, and mechanics working on Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.4L Gen-3 Hemi engine. It is especially suited for those seeking enhanced durability and reliable sealing in high-output or heavy-duty applications such as street performance, towing, and off-road use.

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.