I have heard from the dyno guys that "what you need is a PC3 USB and we can get more HP". from what have I read that seems like everyone has one except me. But I have also heard neg feedbacks that is is just a crock. better to just ride stock and spend $$ in susp. Since I added my pipe I get decel popping and heard that PC3 will fix that as well as add power/fuel mileage. By adding a K&N will lean it out even more. For nearly $400 is it really worth getting? Pos/neg thoughts appreciated.