01 UK WRX Remap/ECU
 

Is it possible to get my standard WRX Remapped or ECU (Ecutek etc) changed to upgrade the performance? I don't want to start modding fuel pumps, plugs, injectors etc. Just a map or ECU.

Q1 If yes, who near South Wales does it?

Q2 How much power gain?

Q3 How much money?
Ta everyone.