Cometic Gasket Gen-3 MLS Head Gasket

2011–2019 Chrysler / Dodge / Jeep / Ram 6.4L HEMI

Part #: C15173-044

Overview

The Cometic Gen-3 Multi-Layer Steel (MLS) Head Gasket is engineered specifically for the 6.4L HEMI engines used in a variety of Chrysler, Dodge, Jeep, and Ram vehicles from 2011 through 2019. Designed to provide a superior seal between the cylinder head and engine block, this gasket ensures optimal combustion chamber integrity and prevents leaks even under high cylinder pressures and extreme operating conditions.

Ideal for performance enthusiasts, professional engine builders, and mechanics, this gasket delivers reliable, long-lasting performance without the need for additional sealants. Whether you are rebuilding, upgrading, or maintaining your Gen-3 6.4L HEMI engine, the Cometic Gen-3 MLS Head Gasket offers peace of mind and durability for demanding applications.

Key Features

Cometic’s Gen-3 MLS Head Gasket incorporates advanced materials and design elements to meet the rigorous demands of high-output engines:

• Multi-layer stainless steel construction for enhanced strength and durability
• Embossed outer layers coated with heat-resistant Viton rubber for superior sealing
• Compressed operating thickness of 0.098" ensures precise fit and reliable compression
• Compatible with aluminum heads to aluminum or cast iron blocks, resisting shearing forces
• Corrosion-resistant materials extend gasket life under harsh conditions
• Center shim layer of uncoated stainless steel tailored for exact thickness requirements
• Viton coating withstands temperatures up to 250°C (482°F) and harsh sealing environments
• Designed for the left-hand side (LHS) bore size of 4.150 inches with .044 inch thickness
• No sealants required, simplifying installation and reducing potential failure points

Construction & Design

This head gasket features multiple embossed layers of premium stainless steel, providing exceptional strength and the ability to rebound under pressure. The outer layers are coated with Viton, a high-performance fluoroelastomer rubber known for its excellent heat resistance and chemical stability. This coating enhances the gasket’s ability to maintain a tight seal despite thermal cycling and mechanical stress.

The center shim layer is made of uncoated stainless steel, allowing precise control over gasket thickness to match exact engine specifications. This multi-layer design effectively accommodates the differential expansion between aluminum cylinder heads and aluminum or cast iron engine blocks, preventing leaks caused by shearing forces and ensuring long-term durability.

Installation & Fitment

The Cometic Gen-3 MLS Head Gasket is a direct factory replacement designed for a straightforward installation process with no modifications required. Its precise dimensions and robust construction allow it to maintain a reliable seal under the high cylinder pressures typical of Gen-3 6.4L HEMI engines.

This gasket fits the following vehicles equipped with the 6.4L HEMI engine:

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

What's Included

• One Cometic Gen-3 MLS Head Gasket, Left Side, .044" Thickness, 4.150" Bore

Ideal For

This gasket is perfect for performance enthusiasts, professional engine builders, and mechanics who demand a high-quality, reliable sealing solution for Gen-3 6.4L HEMI engines. It is especially suited for vehicles subjected to high horsepower, track use, towing, or heavy-duty applications where factory gaskets may not provide sufficient durability or sealing performance.

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.