Easy to install. Affordable. Reliable.   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.  Due to the amount of variation on this vehicle, please ensure you read the Configuration - Memo Text in PCLink. This product supports the following models: 2007-2014 WRX and WRX STI with GR/GV/GH/GE chassis codes, for JDM/AUDM/SADM/EURO markets, with turbocharged EJ20 or EJ25 engines. 2008-2010 USDM models which have the common international Denso ECU Pinout 2015-2021 WRX STI with VAB/VAF chassis codes, for JDM/AUDM/SADM/EURO markets, with turbocharged EJ20 or EJ25 engines Review our supported models list to determine which models are included and which are not. Note : Supports North American models with Denso ECU from late 2007-2010 only. Some North American models