Mishimoto MMRAD-STI-08 - 08-09 Subaru WRX/STi Manual Aluminum Radiator
Performance Aluminum Radiator, fits Subaru WRX 2008-2014/Subaru STI 2008-2021
Aluminum radiator engineered for efficient heat dissipation and optimal engine cooling. Precision-fit design ensures easy installation, corrosion resistance, and reliable performance across varied driving conditions.
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 Aluminum 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 aluminum 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.
- Full aluminum construction features durable, TIG-welded end tanks
- Features a two-row, 1.65 thick brazed aluminum core
- Increased coolant capacity directly results in improved cooling efficiency
TechSpec Overall Height (in): 21.8
TechSpec Overall Length (in): 28
TechSpec Overall Width (in): 2.15
TechSpec Core Length (in): 27.08
TechSpec Core Height (in): 13.39
TechSpec Fluid Capacity (gal): 2.21
TechSpec Rows: 2
TechSpec Inlet (in): 1.54
TechSpec Outlet (in): 1.54
TechSpec Core Thickness (in): 1.65
TechSpec Drain Plug Thread Size: M12 x 1.5
TechSpec DPI: 13091/13093
TechSpec Material: N/A
TechSpec Applications: 2008-2014 Subaru WRX--2008-2019 Subaru STI--2009-2013 Subaru Forester XT--2005-2009 Subaru Outback XT--2005-2009 Subaru Legacy GT
TechSpec Engine Codes: EJ255--EJ257
TechSpec Chassis Codes: GE--GH
TechSpec Note: This item is for Manual Transmission vehicles. For automatic applications, please purchase optional Mishimoto Universal Transmission Cooler Kit.--Caution--The provided Mishimoto two-way cap (six-sided design) should replace the stock cap located on the expansion tank. The Mishimoto Performance Aluminum Radiator should utilize the included one-way cap (circular design with non-directional sticker).--It is the installer's responsibility to check all thermostat plugs, NPT plugs, line fittings, and other connections to assure they are fully tightened before operating the vehicle. Mishimoto recommends that you check all connections at regular intervals, especially during the first few miles after installation. For additional technical information, contact support@mishimoto.com.--Use small fitting for:--2008-2009 Subaru WRX--2008-2019 Subaru STI----Use large fitting for:--2010-2014 Subaru WRX--2005-2009 Subaru Legacy GT--2005-2009 Subaru Outback XT--2009-2013 Subaru Forester XT
TechSpec Includes: (1) Mishimoto Radiator--(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
SellingPoint01: Direct fit for the 2008-2014 Subaru WRX/2008-2021 STI
SellingPoint02: Full aluminum construction features durable, TIG-welded end tanks
SellingPoint03: Features a two-row, 1.65” thick brazed aluminum core
SellingPoint04: Increased coolant capacity directly results in improved cooling efficiency
SellingPoint05: Provides efficient temperature reduction for use on the street, track, rallycross, or autocross course
SellingPoint06: Now includes two 1.3 bar high-pressure caps, raising the boiling point of engine coolant to provide a safer, more efficient system
SellingPoint07: Two-way expansion tank cap and one-way radiator cap ensure proper flow and function of cooling system to avoid overheating
SellingPoint08: Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
SellingPoint09: Mishimoto Lifetime Warranty
SellingPoint10: N/A
SellingPoint11: N/A
SellingPoint12: N/A
SellingPoint13: N/A
SellingPoint14: N/A
SellingPoint15: N/A
Install Difficulty: 3
Core Finish: Uncoated
Core Height: 13.39
Core Length: 27.08
Core Material: Aluminum
Core Row Quantity: 2
Core Thickness: 1.65
Down Flow Or Cross Flow Type: Down Flow
Drain Plug Included: Yes
Drain Plug Thread Size: M12 - 1.5
Fluid Capacity: 2.21
Inlet Diameter: 1.54
Inlet Location: Top Left
Outlet Diameter: 1.54
Outlet Location: Bottom Left
Overall Height: 21.8
Overall Length: 28
Overall Width: 2.15
Radiator Cap Included: Yes
Transmission Oil Cooler Fitting Type: N/A
Transmission Oil Cooler Included: No
