I bought this 02 wrx and when i took it to the dealership to be checked out, there scan tool couldn't connect to the ECU. which leads me to believe there is some form of EM. i have searched for any form of piggyback system and it appears the stock ecu is there. is there any visible imperfections that could be tell tail signs of a modded ECU other then pulling the map. i haven't decided to go Tactrix or cobb yet on that.. haha
thanks for the imput!