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. This will bring your build up to modern engine control standards, with all the features of a Link G4X storm under the hood. Including datalogging, motorsport control strategies, CAN bus, expansion options for more inputs and outputs and more!

Designed for the WRX V5-6 EJ20. 

• 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 input & output expansion options  

Note: V1.4 onwards of this Plug-in features a new 4 pin powered CAN connector and cannot use the old CANPCB cable for CAN connection.  Use the CANJST4 (Code 101-0198) cable for connecting CAN devices.  This new 4 pin port and cable provides not only the CAN connection, but also a protected 12V power supply and ground for powering the CAN devices.  The power supply is protected by a self-resetting fuse rated at 3A continuous. 

Suitable Applications for 228-4000 automotive computer unit:
GC8F 
GC8G 
WRX and STI from 09/1998 to 08/00 
MY99 & MY00