Are you using the gear dependant boost limitation' date=' or throttle / rpm based? I've had an Apexi for months, but haven't yet got round to wiring it up. Looks a bit complicated! [/quote'] I am using the gear and the rpm based setup on my apexi and its much better than my old boostregulator. I am going for one bar boost with the 1.5 c2 software, 8.5:1 spacer, Autotech 262 cams, and the turbo I want is the gt3071r with ar 1.06. Do u guys think this will be good for 350whp? or will it be out of breath when I hit 5500rpm?