Mishimoto Aluminum Water Cooler for Subaru Impreza WRX-STI (2008-2014)

Whether you’re cruising down back roads in your WRX or pushing your STI to its limits during a track day, maintaining optimal cooling fluid temperature is essential to protect your EJ engine.

The plastic end tanks and limited cooling capacity of the stock radiator can quickly become a weak link, especially during spirited driving or summer drives in intense heat.

A cooling system failure can lead to overheating, cylinder head gasket issues, and costly repairs that will put an end to your driving adventures.

The Mishimoto Performance high-capacity aluminum radiator for the 2008–2014 Subaru WRX and 2008–2021 Subaru STI is designed to be the ultimate protection for your engine, offering improved cooling efficiency and durability compared to the stock unit. Featuring a lightweight dual-core design and 100% brazed aluminum construction, this radiator maximizes heat dissipation and has high resistance to pressure to keep your engine running at peak performance.

The polished, TIG-welded end tanks add resistance and a premium finish, while the direct-mounting design ensures a simple installation with no cutting or modifications required.

The included 1.3 bar pressure radiator cap raises the boiling point of your cooling fluid for an extra safety margin during high-performance tuning.

With up to a 30% increase in cooling efficiency compared to the stock unit, this upgrade is ideal for daily driving, quick trips, or competition use.

Backed by Mishimoto’s lifetime warranty, including accident protection, this radiator is designed to keep your Subaru running strong for many years to come.