Just went to stage 2 cobb, tsudo downpipe, cnt racing single 3" all the way back! Getting a perrin stg2 CAI tune today. The change in power is amazing, if people think its to exspensive to go turbo back, it was $450 new for this package, and there was zero problems with install and function. These exhaust sound so nasty, sounds just like my old ducati monster with a full exhaust, nice rumble not ricer sounding! Well just thought I would share.... super stoked and pleased!