Mishimoto Aluminum Expansion Tank

2015–2023 Dodge Challenger / Charger 6.4L & 6.2L Hellcat

Part #: MMRT-SRT-15BK

Overview

The Mishimoto Aluminum Expansion Tank is a premium upgrade designed specifically for Dodge Challenger and Charger models equipped with the 6.4L 392 HEMI and 6.2L Hellcat engines from 2015 through 2023. This high-quality aluminum coolant reservoir replaces the factory plastic tank, which is known to discolor, degrade, and develop leaks over time. Crafted to enhance both durability and engine bay aesthetics, the tank features a sleek micro-wrinkle black finish that complements the aggressive styling of Mopar muscle cars.

Ideal for enthusiasts who demand reliability and style, this expansion tank provides a long-lasting solution that withstands the rigors of high-performance driving. Its innovative internal baffling system with an integrated cold-fill line eliminates the need for external sight glasses or tubes, maintaining a clean and uncluttered engine compartment.

Key Features

The Mishimoto Aluminum Expansion Tank offers a blend of functional improvements and refined styling to elevate your vehicle’s cooling system:

• Direct fitment for 2015–2023 Dodge Challenger and Charger with 6.4L 392 and 6.2L Hellcat engines
• Constructed from TIG-welded aluminum for superior strength and corrosion resistance
• Durable micro-wrinkle black finish enhances engine bay appearance and resists wear
• Internal baffling reduces coolant sloshing and maintains consistent fluid levels during spirited driving
• Integrated cold-fill line eliminates the need for external sight tubes or gauges
• Improved durability compared to factory plastic tanks prone to cracking and leaking
• Designed to withstand high temperatures and pressure fluctuations common in performance applications
• Compatible with stock cooling system components for hassle-free installation
• Available in a natural aluminum finish for custom powder coating or hydro dipping
• Backed by the Mishimoto Lifetime Warranty for peace of mind

Construction & Design

Expertly crafted from high-grade aluminum, the Mishimoto Expansion Tank features TIG-welded construction that ensures a robust, leak-free design outperforming the OEM plastic reservoir. Aluminum offers superior heat dissipation and resists the brittleness and degradation that commonly affect plastic tanks over time. The micro-wrinkle black finish not only provides a textured surface that hides fingerprints and minor scratches but also complements the aggressive styling of Dodge muscle cars.

Internally, the tank incorporates a baffling system engineered to minimize coolant movement during aggressive driving, maintaining stable fluid levels. The integrated cold-fill line allows for easy coolant top-offs without compromising the tank’s clean exterior design, eliminating the need for unsightly external sight glasses or tubes.

Installation & Fitment

The Mishimoto Aluminum Expansion Tank is designed as a direct replacement for the factory coolant reservoir on 2015–2023 Dodge Challenger and Charger models with 6.4L 392 and 6.2L Hellcat engines. Installation is straightforward and requires no modifications or special tools. The tank mounts securely using existing factory mounting points and connects seamlessly with the stock coolant lines, ensuring a leak-free fit and reliable operation.

What's Included

• Mishimoto Aluminum Expansion Tank (Micro-Wrinkle Black Finish)
• All necessary mounting hardware
• Detailed installation instructions

Ideal For

This expansion tank is perfect for Dodge Challenger and Charger owners looking to replace the factory plastic coolant reservoir with a more durable and visually appealing component. It is especially suited for enthusiasts who regularly engage in performance driving and require a reliable cooling system upgrade that complements their vehicle’s aggressive styling. Additionally, those interested in customizing their engine bay will appreciate the availability of a natural finish option for custom coatings such as powder coating or hydro dipping.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.