I'm sorry, I have read through threads and tried to search, but I'm still confused. I just got a yoshimura r55 full exhaust and installed it Monday night. I know it's not the most popular exhaust, but it was what I could afford and I really like the looks personally. But I'm not sure what the next step is. The bike is definitely lighter, definitely louder, and it seems to pull a little harder although that could just be my imagination. So now, do I need a power commander v ? Is it better to send my ecu to Cblast and have it flashed? Or should I do both? I'm sorry, I know this has probably been beat to death but this is my first full system. All of my previous bikes just had slip ons and maybe a double bubble. Since I figured I'd be keeping the 14r for a long time, I decided to go full system. Thanks in advance for any help.