put it on today. took about 30-45 minutes taking my time. now that i have done it and im familiar with my new bike it could be done much faster. i went with the two bros because my buddy has one on his 750 and it sounds TITS! also because so many others seem to be getting the same thing and i wanted something atleast a little different. the quality, fit, hardware, instructions and sound are all awesome....i recomend it to anyone. my idle, throttle and driveability are still fine but i will atleast get a map for it when i get around to it. here are some pics for anyone interested.