Whether you’re carving through back roads in your WRX or pushing your STI to the limit on track day, maintaining optimal coolant temperatures is essential to protecting your EJ engine. The factory radiator’s plastic end tanks and limited cooling capacity can quickly become a weak link, especially under the high demands of spirited driving or hot summer commutes. A failure in the cooling system can lead to overheating, head gasket issues, and costly repairs that cut your driving adventures short. The Mishimoto Performance Aluminium Radiator for the 2008–2014 Subaru WRX and 2008–2021 Subaru STI is engineered to be the ultimate safeguard for your engine, delivering improved cooling efficiency and durability over stock.
Built with a lightweight, dual-core design and 100% brazed aluminium construction, this radiator maximizes heat dissipation and withstands higher pressures to keep your engine performing at its best. The TIG-welded, polished end tanks add strength and a premium finish, while the direct-fit design ensures a straightforward installation with no cutting or modification required. The included high-pressure 1.3 bar radiator cap raises the boiling point of your coolant for an extra margin of safety under heavy loads, and a second radiator cap is included for use on the expansion tank. With up to a 30% increase in cooling efficiency over the factory unit, this upgrade is ideal for daily driving, spirited runs, or competitive use.
Backed by the Mishimoto Lifetime Warranty, including accident protection, this radiator is built to keep your Subaru running strong for years to come.
Performance Aluminium Radiator, fits Subaru WRX 2008-2014/Subaru STI 2008-2021
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- Direct fit for the 2008-2014 Subaru WRX/2008-2021 STI
- Full aluminium construction features durable, TIG-welded end tanks
- Features a two-row, 1.65” thick brazed aluminium core
- Increased coolant capacity directly results in improved cooling efficiency
- Provides efficient temperature reduction for use on the street, track, rallycross, or autocross course
- Now includes two 1.3 bar high-pressure caps, raising the boiling point of engine coolant to provide a safer, more efficient system
- Two-way expansion tank cap and one-way radiator cap ensure proper flow and function of cooling system to avoid overheating
- Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
- Mishimoto Lifetime Warranty
Key Features
- Direct fit for the 2008-2014 Subaru WRX/2008-2021 STI
- Full aluminium construction features durable, TIG-welded end tanks
- Features a two-row, 1.65” thick brazed aluminium core
- Increased coolant capacity directly results in improved cooling efficiency
- Provides efficient temperature reduction for use on the street, track, rallycross, or autocross course
- Now includes two 1.3 bar high-pressure caps, raising the boiling point of engine coolant to provide a safer, more efficient system
- Two-way expansion tank cap and one-way radiator cap ensure proper flow and function of cooling system to avoid overheating
- Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
- Mishimoto Lifetime Warranty
| Overall Length (in) | 28 |
|---|---|
| Overall Height (in) | 21.8 |
| Overall Width (in) | 2.15 |
| Core Length (in) | 27.08 |
| Core Height (in) | 13.39 |
| Core Thickness (in) | 1.65 |
| Fluid Capacity (gal) | 2.21 |
| Rows | 2 |
| Inlet (in) | 1.54 |
| Outlet (in) | 1.54 |
| Drain Plug Thread Size | M12 x 1.5 |
| DPI | 13091/13093 |
| Applications | 2008-2014 Subaru WRX 2008-2021 Subaru STI 2009-2013 Subaru Forester XT 2005-2009 Subaru Outback XT 2005-2009 Subaru Legacy GT |
| Engine Codes | EJ255 EJ257 |
| Chassis Codes | GE GH |
| Note | This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto Universal Transmission Cooler Kit. |
| Coolant Capacity | 2.21 |
(1) Mishimoto Two-Way Radiator Cap
(1) Mishimoto One-Way Radiator Cap
(2) Overflow Ports
(1) Magnetic Drain Plug
Fan Mounting Hardware
Mishimoto Lifetime Warranty
For years, Subaru enthusiasts have chosen our performance aluminum radiators as a reliable way to increase cooling capacity and durability beyond what factory equipment can provide. Built from fully brazed aluminum and engineered for a direct fit, these radiators have proven themselves in both daily driving and high-performance conditions. While the radiator itself is the heart of the system, smaller components are just as critical to long-term reliability. One of the most important is the radiator cap, and our latest update ensures that Subarus from 2002 onward equipped with dual radiator caps now receive exactly the right components for their system.
These Subarus feature
Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.
For our complete warranty policy, please click here.
