Koyo 2003-2007 Subaru Impreza WRX/STI Radiator

Koyorad VH091672 – Aluminum Racing Radiator for Subaru WRX/STi (2002–2007, Manual Transmission)
Upgrade your Subaru WRX or STi with the Koyorad VH091672 aluminum racing radiator—engineered to deliver superior cooling performance and long-term reliability. Designed specifically for 2002–2007 WRX and STi models with a manual transmission, this high-performance radiator is a must-have for enthusiasts looking to keep coolant temps under control during spirited driving, track days, or high-boost setups.

While factory radiators rely on plastic end tanks that weaken over time, the Koyorad VH091672 features full aluminum construction and precision TIG welds to handle intense heat cycles and vibrations. The high-efficiency core increases cooling capacity, while the optimized tube-and-fin design ensures maximum airflow and heat transfer.

The Hyper V-Core Series is the newest to the Koyorad All Aluminum Racing Radiator line up. An engine's cooling system in many newer vehicles are suffering due to limited space and crowding which affects air circulation. The new ultra efficient Hyper V core was developed specifically for vehicles which see extreme heat, are limited in space, and where the factory inlet/outlet locations eliminate the option for a proper N-FLO design.

The Hyper V Series radiators have a specially designed fin and tube pitch which significantly increased its surface area while still allowing for excellent air circulation through the radiator. The Hyper V-Core series is the perfect solution where space savings and high performance is a must. All Koyorad Hyper V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

Key Features:

• Direct-fit aluminum racing radiator for 2002–2007 Subaru WRX/STi (manual only)
• All-aluminum construction—no plastic end tanks to crack or leak
• TIG-welded tanks and Nocolok brazing for superior strength and reliability
• Thicker core and optimized fin density for improved cooling efficiency
• Precision-machined billet filler neck and 1/8PT accessory port (plug included)
• Ideal for street, autocross, rally, or track applications

This Koyorad radiator is a proven cooling upgrade for Subaru WRX/STi owners looking to replace a failing OEM radiator or prevent future overheating issues. Whether you're chasing lap times or mountain roads, it's a performance cooling solution you can count on.

Fits:

Impreza WRX 2003-2007
Impreza WRX STI 2004-2007

Notes:

• The upper radiator hose may require trimming for proper clearance
• Early model WRX owners need to verify that their stock radiator has a radiator cap as early WRX models without a radiator cap need the 2002 WRX radiator
• For models with a manual transmission only