I am selling my 03 ecu that was custom flashed by ams and dyno tuned. It was flashed for their stage 3 setup. My car made 348AWHP on pump gas at 21.5psi with this flash so it will make very good power! I went with a full ems so i dont need it anymore. I dont need your stock ecu so u can have this flashed one and keep yours too!!!! Im looking for 570.00 shipped. Let me kno.