oh ya baby! 06 WR 450 WFO !!! pretty loud, ordered the quiet insert but got the wrong one my jetting is still not spot on, still have the AIS on,(waitin for the kit, plus my JD jetting kit) but i can sure feel a surge above the mid range that wasn't there before! can't wait till the oregon sand that got past my filter forces me into the 488 kit! waahoo! anyone runnin an FMF power bong? i mean bomb? does it change you power curve again?