2004–2006 Subaru WRX - Link (04) - WRX104X

The WRXLink (04) - WRX104X is a high-performance G4X PlugIn ECU engineered for 2004–2007 Subaru WRX and STI V10 models with manual transmissions. This unit fits directly into the OEM enclosure, ensuring a factory-style installation with no modifications to the wiring loom. It offers advanced tuning capabilities, including 6D fuel and ignition mapping, precision closed-loop cam control, and sequential fuel delivery. The system features 5D boost control, integrated knock management, and 512MB of internal data logging for motorsport analysis. To ensure optimal engine performance and reliability, this product must be paired with a custom etune from Migtuned. Visit the [Migtuned website](https://migtuned.com) to select the specific custom etune for your year and model. This ECU is designed for GD/GG chassis with electronic throttle.