So I just got into track driving with my 2010 5-door Impreza 2.5i (please keep the laughing to a minimum) and am looking for some upgrades I can do to make it more fun/enjoyable. The first is looking into larger wheels. I have 16s on now, and wasn't sure how much larger I can go with the vehicle. Second, was something that one of my instructors mentioned which is an engine chip to program shift points and remap the torque curve. Is that a possibility with this car? Any other suggestions are welcome as well.