im just wondering what the downsides may be to the greddy kit. i know the price is why most people dont go that way, but other than that whats so bad? and how "bad" is the e-manage that comes with it? im guessing i'd be better off chipping/tuning with crome etc...but COULD i use e-manage safely untill i get dyno tuned? and could i use it on an obd2 n/a car?