Koyo Aluminum Racing Radiator Manual Transmission Subaru WRX / STI 2003-2007 - Dirty Racing Products

Koyo Aluminum Racing Radiator Manual Transmission Subaru WRX / STI 2003-2007


Regular price$328.00
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The Hyper V-Core Series is the newest to the Koyorad | Koyo 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. Our 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 increases 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. Unless noted otherwise, 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. See notes in individual item descriptions for details.

Koyo Radiators are very durable and are direct replacements for your factory intercooler.

  • All aluminum construction
  • Heli-arc welded for stronger enforcement along aluminum connections
  • Thicker core
  • Precise tube and fin alignment promotes optimal coolant flow and fins with highly efficient heat transfer
  • NoClock Brazing is featured on the tubes, fins, headers and brackets using a state-of-the-art NoClock furnace which bonds all components to resist damage from vibration, road debris, and the elements
  • Billet Filler Neck is precision machined for durability
  • Fits manual transmission

Note that 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. WRX models without a radiator cap need the 2002 WRX radiator.


  • 2004 - 2006 Subaru Baja Engine: 2.5L H4 TURBO MT
  • 2003 - 2005 Subaru Impreza Engine: 2.0L H4 WRX Turbo MT Note: WRX Trim
  • 2004 - 2007 Subaru Impreza Engine: 2.5L H4 STI Turbo MT Note: WRX and STI Trim w/ 2.5L Turbo MT
  • 2006 - 2007 Subaru Impreza (06-07) Engine: 2.5L H4 WRX Turbo MT

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