So I've been advised that ITBs are a PITA, when it comes to tuning. My question is, I know they're not as good as F/I but how much more power can you get from them. It has to be better than just getting an intake right? And what makes tuning them and maintaining the tune so hard? They don's seem to be very popular, I actually haven't seen anyone use them. Any opinions? Oh also anyone have an opinion about JET ECUs?