Cometic Gasket MLX RHS Head Gasket

2011–2026 Chrysler / Dodge / Jeep / Ram 6.4L 392 & 6.4L SRT

Part #: C15172-040

Overview

The Cometic MLX RHS Head Gasket is engineered for high-performance 6.4L 392 and 6.4L SRT engines found in a range of Chrysler, Dodge, Jeep, and Ram vehicles from 2011 through 2026. Designed to provide superior sealing under extreme conditions, this head gasket is ideal for enthusiasts and professionals seeking reliable durability and enhanced engine integrity. Whether you’re rebuilding, upgrading, or maintaining your powerful V8, the Cometic MLX RHS gasket ensures a precise fit and long-lasting performance.

Built to withstand the demands of high horsepower and torque applications, this gasket supports optimal combustion chamber sealing, preventing leaks and maintaining compression. It is a critical component for maintaining engine efficiency and reliability in demanding driving environments.

Key Features

Cometic’s MLX RHS Head Gasket combines advanced materials and manufacturing techniques to deliver exceptional performance and durability. Key features include:

• Precision 4.150" bore size tailored for 6.4L 392 and 6.4L SRT engines
• .040" thickness for optimal sealing and gasket crush
• Multi-layer steel (MLS) construction for superior strength and heat resistance
• Designed to resist corrosion, tensile stress, and yielding under high pressure
• Compatible with factory and aftermarket cylinder heads
• Ideal for both street and track applications
• Manufactured with premium alloy materials including copper, aluminum, and stainless steel
• Ensures consistent sealing to prevent coolant, oil, and combustion gas leaks
• Recommended purchase quantity of two gaskets for both cylinder head sides

Construction & Design

The Cometic MLX RHS Head Gasket features a robust multi-layer steel design that combines layers of stainless steel with advanced sealing coatings. This construction provides excellent resistance to thermal cycling, high combustion pressures, and chemical exposure. The gasket’s alloy materials are carefully selected for their corrosion resistance and mechanical strength, ensuring a reliable seal over extended service intervals.

Cometic’s manufacturing process incorporates precision stamping and coating technologies, resulting in a gasket that maintains consistent thickness and flatness. This precision engineering reduces the risk of head warpage and gasket failure, critical for high-output 6.4L engines.

Installation & Fitment

This head gasket is a direct fit replacement for a wide range of vehicles equipped with the 6.4L 392 and 6.4L SRT engines. It fits the following models and year ranges:

• 2011–2014 Chrysler 300 6.4L 392
• 2015–2024 Chrysler 300 6.4L 392
• 2011–2014 Dodge Challenger 6.4L 392
• 2015–2023 Dodge Challenger 6.4L 392
• 2011–2014 Dodge Charger 6.4L 392
• 2015–2023 Dodge Charger 6.4L 392
• 2018–2026 Dodge Durango 6.4L 392
• 2011–2021 Jeep Grand Cherokee 6.4L SRT
• 2018–2026 Jeep Wrangler 6.4L 392
• 2011–2018 Ram 2500 6.4L 392
• 2019–2026 Ram 2500 6.4L 392
• 2011–2018 Ram 3500 6.4L 392
• 2019–2026 Ram 3500 6.4L 392

Installation requires standard head gasket replacement procedures. It is recommended to replace both head gaskets (purchase quantity of two) to ensure proper sealing on both cylinder heads. Proper torque specifications and surface preparation are essential for optimal results.

What's Included

• One Cometic MLX RHS Head Gasket (4.150" Bore, .040" Thickness)
• Installation instructions (where applicable)

Ideal For

This head gasket is ideal for performance enthusiasts, professional engine builders, and mechanics working on Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.4L 392 or 6.4L SRT engines. It suits applications ranging from daily driving to high-performance street and track use, providing a reliable sealing solution that supports engine longevity and power output.

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.