Mishimoto 2015 Ford Mustang EcoBoost / 3.7L / 5.0L Aluminum Coolant Expansion Tank-Polished

When you're pushing your 2015-2023 Ford Mustang hard, whether it's on the track or just spirited driving, keeping your cooling system in check is crucial. This Mishimoto aluminum coolant expansion tank is designed to replace the stock plastic unit, offering improved reliability and a cleaner look under the hood. It features internal baffles that help prevent coolant from sloshing away from the overflow port during hard cornering, braking, or acceleration, which can otherwise lead to air entering the system and causing overheating issues.

Beyond its functional benefits, this tank is also a significant styling upgrade. Constructed from durable, TIG-welded aluminum and finished in a polished look, it's a much more attractive piece than the factory plastic reservoir. A built-in sight glass makes it easy to check your coolant level at a glance, both when hot and cold. Mishimoto also includes an overflow nipple on the fill neck, which is useful if you plan to add an auxiliary coolant tank for NHRA compliance.

Installation is straightforward and typically takes less than an hour, using the stock expansion tank cap. This well-built tank is designed to fit your 2015-2023 Mustang EcoBoost, V6, or GT models perfectly.