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.?Please check your pinout matches the header in the listed photo 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
WRX and STI from 09/1998 to 08/00
MY99 & MY00