Mishimoto Aluminum Expansion Tank

2015–2023 Dodge Challenger / Charger 6.2L Hellcat & 6.4L 392 HEMI

Part #: MMRT-SRT-15BK

Overview

The Mishimoto Aluminum Expansion Tank is a premium coolant reservoir upgrade engineered specifically for Dodge Challenger and Charger models equipped with the 6.2L Hellcat and 6.4L 392 HEMI engines from 2015 through 2023. Designed to replace the factory plastic tank, this aluminum expansion tank addresses common issues such as discoloration, cracking, and leaks that occur over time with OEM plastic reservoirs.

Built for enthusiasts who demand both durability and style, this expansion tank enhances engine bay aesthetics with its sleek micro-wrinkle black finish while providing superior performance under the high temperatures and pressures typical of Mopar muscle cars. Its innovative internal baffling and integrated cold-fill line ensure reliable coolant management during spirited driving without cluttering the engine compartment.

Key Features

The Mishimoto Aluminum Expansion Tank combines functional improvements with refined styling to elevate your vehicle’s cooling system:

• Direct fitment for 2015–2023 Dodge Challenger and Charger with 6.2L Hellcat and 6.4L 392 HEMI engines
• Constructed from TIG-welded aluminum for exceptional 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 aggressive driving
• Integrated cold-fill line eliminates the need for external sight tubes or gauges, preserving a clean engine bay
• Improved longevity 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 precision TIG-welded construction that ensures a robust, leak-free design outperforming the OEM plastic reservoir. Aluminum’s superior heat dissipation properties help maintain optimal coolant temperatures while resisting the brittleness and degradation that commonly affect plastic tanks over time.

The micro-wrinkle black finish provides a textured surface that conceals fingerprints and minor scratches, perfectly complementing 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 and preventing aeration.

The integrated cold-fill line allows for convenient 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 equipped with the 6.2L Hellcat and 6.4L 392 HEMI 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 ideal for Dodge Challenger and Charger owners seeking a durable, high-quality replacement for the factory plastic coolant reservoir. 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 aluminum 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.