Mishimoto aluminum radiators and intercoolers deliver superior cooling for both daily drivers and high-performance vehicles. Their radiators feature all aluminum construction and a tube-and-fin design, offering exceptional heat dissipation to maintain optimal engine temperatures, even in heavy traffic or during spirited driving.
Fitment Information
- Subaru WRX H4 2.0 (2002, 2003, 2004, 2005)
- Subaru WRX H4 2.5 (2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014)
- Subaru WRX STI H4 2.5 (2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021)
Note
- Manual transmission. For automatic transmissions, please purchase the optional Mishimoto Universal Transmission Cooler.
- The provided Mishimoto radiator cap should replace the stock cap located on the expansion tank. The stock cap attached to the radiator should be installed on the Mishimoto Performance Aluminum Radiator. The Mishimoto radiator cap is a two way valve, while the stock radiator cap is a single valve. Due to the difference in construction, the Mishimoto cap cannot be used on the radiator. If the Mishimoto cap is fit on the radiator, overheating may occur.
Caution
- Due to the additional thickness of our 3-row X-Line radiator, trimming the upper hose may be necessary.
- For 2002-2003 Subaru WRX models built before 7/2002, remove fill neck overflow nipple and replace with 1.5875mm NPT plug provided.
Specs & Features
- All-Aluminum Construction— TIG-welded end tanks eliminate plastic failure points, ensuring maximum durability.
- Two Cooling Options for Every Build— 2-row for reliable street performance, or X-Line 3-row for track, high-boost, and extreme conditions.
- Increased Coolant Capacity— Holds more coolant than stock, improving thermal regulation and reducing overheating risks.
- Optimized Heat Dissipation— Brazed aluminum core with high-efficiency fins maximizes coolant flow and temperature stability.
- Designed for Turbocharged Performance— Built to handle the demands of WRX and STI engines, keeping intake temps lower for consistent power.
- Direct-Fit Installation— Designed for OEM compatibility, ensuring a quick and seamless bolt-on fit.
- Works with Stock & Aftermarket Components— Fully compatible with factory radiator hoses and Mishimoto Silicone Hoses for a leak-free fit.
- Mishimoto Lifetime Warranty— Industry-leading protection, ensuring long-term performance and peace of mind.
Product Description
The Subaru WRX and STI's turbocharged EJ engine is built for power and performance, but rising temperatures can quickly kill your boost and put stress on vital components. Stock radiators with plastic end tanks are prone to cracking, leading to cooling inefficiencies, leaks, and potential engine damage. The Mishimoto Performance Aluminum Radiator eliminates those concerns with a fully TIG-welded aluminum design, built for maximum strength, superior heat dissipation, and extreme durability. Whether you opt for the 2-row version for reliable daily performance or the X-Line 3-row for aggressive tuning and track use, this radiator keeps your engine temps low and power delivery consistent—even under extreme conditions.
With a direct-fit, bolt-on design, installation is quick and hassle-free, seamlessly integrating with both stock and aftermarket setups. Whether you’re a weekend warrior, dedicated track competitor, or just want peace of mind for long-term reliability, the Mishimoto Performance Aluminum Radiator is a must-have cooling upgrade. Keep your WRX and STI running cooler, boosting harder, and performing at its best—Upgrade today and take control of your cooling system!
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Mishimoto Aluminum Radiator
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