just wondering if it would b neccesary, like im not power hungry but if id get alot more from it with a nistune it think about it, rb20det, decat, full system, walbro pump, fmic, r33 turbo, air filter, and ill b getting a downpipe soon, would it be worth my while getting a nistune seeing as tho there pretty cheap? or could i run about 10 psi on stock ecu ok? any input appreciated