Just fitted my FMF pipe and mid-pipe on my 450. It was kind of a bear to get it to fit with out either pointing directly at the turn signal, and or, hitting the rear fender. I ended up making a small hanger to drop it down a little, and still had to turn my signal light upwards just a tad. Pipe is a lot louder than the stock Kreiger unit, but bike pulls harder right though the band.
