Originally Posted by Stevie76
No not really....for all they are louder you only really notice it if you have the foot down/higher revs. If you are cruising not much difference. I love the sound....only thing to consider is track day noise regs.
Did a Euro trip and andrew186 has the 650R....couldn't really tell but when he nailed it...it did sound good. Him and his passenger didn't seem to be annoyed by it... More raspy than I expected! Guess it depends on the combo of Y pipe and cat back etc?