Hi i live in the UK and i have a ALmera GTI which uses the SR20D engine. I dont understand why you can only get 125 out of your sentra. I can get 150 out of mine but on a closed off road. My Limiter is at 7500. I dont see why you just get yourself a bottom end ECU and tune your engine for bottom end power. Then take your limiter off and get yourself a bottle of NOS 50 shot. But becareful not to blow a piston.