This exhaust turns the mildly quiet m109 into a fire breathing dragon!! The bike will talk and people will turn and look to see whats coming at them. It does add to the over all width of the bike next to the were you would rest your foot on the right side (on the ground) when sitting still, and if your not careful the exiting fumes will catch the back of your leg (nothing major, very minor). However, overall i am really impressed with both the sound and performance. Please be advised that it will take two people to install this system. Four hands will help keep scratches and dings to a minimum. If your looking for a real deep bass-y tone, look no further than this one. This system is not quiet. It is loud, although i suspect not the loudest. Overall, 4.5 out of 5 stars. Awesome look, great performance, great sound.