Koyo Aluminium Racing Radiator - Subaru WRX STI GDB 2001-2007

Koyo VH091672 Aluminium Racing Radiator – Subaru WRX / STI 2001+

The Koyo VH091672 Aluminium Racing Radiator is a high-efficiency cooling upgrade for the 2001+ Subaru WRX and WRX STI (GDA / GDB). Featuring a full aluminium design with a high-density 36 mm Hyper Core, this radiator delivers significantly improved heat transfer and coolant circulation compared to factory plastic-tank radiators that are known to become brittle over time.

Built with TIG-welded end tanks and Nocolok-brazed core construction, the VH091672 provides exceptional durability and reliability for tuned and boosted EJ20 and EJ207 engines. Engineered as a true direct bolt-in upgrade, it retains OEM fan shrouds, factory mounting points and hose locations for a seamless installation with no modifications.

Whether for performance street builds, rally stages, time attack or circuit events, this radiator ensures stable coolant temperatures and protects engine performance under sustained high load.

Key Features

• 36 mm Koyorad Hyper Core for maximum cooling efficiency
• Full aluminium construction – eliminates cracking plastic end tanks
• Precision TIG-welded for long-term strength and leak resistance
• Direct bolt-in replacement – retains OEM hose and fan positions
• Supports tuned and high-boost EJ20 / EJ207 power levels
• Ideal for street, rally, drift and track applications

Vehicle Fitment

• 2001–2007 Subaru Impreza WRX (GDA / GDB – EJ20 Turbo)
• 2001–2007 Subaru Impreza WRX STI (GDB – EJ207 Turbo)
• Manual transmission models