The following images provide the Pin-Out for the 4-Connector MY93 to 96 ECU for the Subaru Impreza WRX/STI/UK
For fitting an Apexi PFC into a MY93 to 96 Impreza Turbo UK model no wires require moving or swapping.
The Apexi PFC will be Plug'N'Play (ignore my scribble below which was for select-monitor data mining).
However, WRX/STi/UK will be limited to 1.1bar boost due to the limitation of the MAP sensor hardware fitted to these models (injector and 'slanty' intercooler will also have performance limitations above 1.1bar).
To run in excess of 1.1bar it is required to fit an after market boost controller Apexi-AVCR (or similar), larger injectors and a higher surface area intercooler
