Mishimoto Aluminum Expansion Tank

2011–2023 Chrysler 300 / Dodge Challenger / Dodge Charger 3.6L V6, 5.7L Hemi, 6.4L 392

Part #: MMRT-MOP-11EN

Overview

The Mishimoto Aluminum Expansion Tank is a high-quality replacement for the stock plastic coolant reservoir found on 2011 to 2023 Chrysler 300, Dodge Challenger, and Dodge Charger models equipped with 3.6L V6, 5.7L Hemi, or 6.4L 392 engines. Designed to withstand the rigors of daily driving and spirited performance, this tank offers enhanced durability and reliability over the factory unit. It not only improves the under-hood aesthetics with its sleek micro-wrinkle black finish but also helps maintain optimal cooling system function during aggressive driving conditions.

Ideal for enthusiasts and daily drivers alike, the Mishimoto Aluminum Expansion Tank addresses common issues such as cracking, warping, and heat degradation that plague stock plastic reservoirs. Its robust construction and thoughtful engineering ensure long-lasting performance and peace of mind.

Key Features

Engineered for durability and performance, this expansion tank includes several advanced features that set it apart from the stock component:

• Direct-fit replacement designed specifically for 2011–2023 Chrysler 300, Dodge Challenger, and Dodge Charger models with 3.6L, 5.7L, and 6.4L engines
• Constructed from 100% TIG-welded aluminum for superior strength and resistance to cracking or warping
• Internal baffles retain coolant near the overflow port during aggressive driving, preventing air from entering the cooling system
• Integrated cold-fill line within the internal baffling maintains a clean exterior without the need for a sight glass
• Compatible with the factory expansion tank cap for hassle-free installation
• Available in a durable micro-wrinkle black finish or natural aluminum, with the natural finish suitable for custom powder coating, anodizing, or hydro dipping
• Resistant to heat degradation, ensuring reliable operation under extreme temperature fluctuations
• Backed by Mishimoto’s Lifetime Warranty for long-term reliability and customer confidence

Construction & Design

The Mishimoto Aluminum Expansion Tank is expertly crafted from high-grade aluminum, utilizing precision TIG welding to create a fully sealed, robust reservoir. This construction method ensures exceptional durability and resistance to the common failures seen in plastic tanks, such as cracking and deformation caused by heat cycling. The internal baffling system is engineered to keep coolant properly positioned near the overflow port, reducing the risk of air pockets that can impair cooling system efficiency during spirited driving or track use.

Its sleek micro-wrinkle black finish not only enhances engine bay aesthetics but also provides corrosion resistance. For those seeking a personalized look, the natural aluminum version offers a blank canvas for custom finishes including powder coating, anodizing, or hydro dipping, allowing enthusiasts to tailor the tank’s appearance to their vehicle’s style.

Installation & Fitment

Designed as a direct-fit replacement, the Mishimoto Aluminum Expansion Tank installs easily using the existing mounting points and hardware. It is compatible with the stock expansion tank cap, eliminating the need for additional parts or modifications. Installation typically requires basic hand tools and can be completed in under an hour by most enthusiasts or professional mechanics. This tank fits all 2011–2023 Chrysler 300, Dodge Challenger, and Dodge Charger models equipped with 3.6L V6, 5.7L Hemi, or 6.4L 392 engines, ensuring precise fitment and seamless integration with the factory cooling system.

What's Included

• Mishimoto Aluminum Expansion Tank (micro-wrinkle black or natural finish)
• Installation hardware
• Detailed installation instructions
• Mishimoto Lifetime Warranty documentation

Ideal For

This expansion tank is perfect for Chrysler and Dodge owners looking to upgrade their cooling system’s reliability and appearance. It is especially suited for enthusiasts who engage in aggressive driving, track days, or those who simply want a more durable and visually appealing alternative to the factory plastic reservoir. Whether you drive a daily commuter or a high-performance muscle car, this tank offers peace of mind and enhanced cooling system performance.

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.