MrBeefy

HI if you have a G4+ plug in ecu in your 2002 WRX which in uk is a bug eye, a 2006 engine will work on this ecu if you swap the inlet manifold to the 2002 one with cable.The VVT can be wired in if its single AVCS i.e inlet cams only the instructions are in the manual what DI channels can be used for vvt input and which outputs to use for solenoids.I fitted a 2004 spec C engine into a 92 impreza worked a treat hope this helps.