G4X PlugIn ECUs offer the latest in engine management technology, designed to easily maximize the potential from your car. This ECU fits inside the factory OEM enclosure. Installation is a breeze, with no alteration of the factory wiring loom required for the models listed below. Designed for the WRX V10 EJ25. These ECUs cover 2.5L from 2004 to 2007.

• Please check your connector matches the header in the listed photo and check the notes in italic below before purchasing.
• This ECU works for manual transmissions only.
• Air temp sensor highly recommended.
• Most factory features are supported.
• Check the features tab for I/O expansion options

Suitable Applications: The WRX104 mostly covered the 2004-2006 range (listed separately). The WRX107 mostly covers the 2007 model. However, some 2006 models require the WRX107 *The fastest and most reliable way to tell, is to check whether pins A1-3 are populated. *If the pins have wires, you need the WRX104 , if there are no wires, you need the WRX107 *Suits GD or GG chassis with electronic throttle. Not suitable for the GR/GH/GE/GV hatchback or 3rd generation WRX’s