I have a coupe turbo with a stage 2 conversion on it (bigger intercooler, new pipes, new airbox, filter etc, dump valve and new software = 250bhp). It has made a huge difference to the car! 0-60 down to under 6 seconds and the 30-70 sprint is 5 seconds!!! That's as quick as an Evo VIII or an Impreza WRX Sti!!
My question is this. Has anyone gone from the phase 2 to the phase 3 with the hybrid turbo. Would you recommend doing it? Its going to cost over a grand to install just for an extra 20bhp or so. Also, I have not upgraded the exhaust system yet. Would there be any performance gains to be made there too? Any help greatly appreciated.