The Link G4X WRXLink (7-9) WRX9-X PlugIn fits the Subaru WRX & STI V7-9. The ECU PCB fits discretely inside the original factory enclosure. Installation of Link's Subaru WRX9-X ECU is a breeze - no alteration of the factory wiring loom is required. A built-in connector (or pins in some models) provides additional inputs and outputs such as oil pressure inputs or anti-lag / logging switches. Factory features are supported - see Features for any exceptions. Includes variable cam control. Suitable for Subaru 2001-2007 models with 2.0L Engine. MAP Sensor not included. Need more inputs and outputs? The XS Expansion Loom offers the ability to add additional inputs & outputs on our range of plug-in ECUs.