ya mine whistles at about half throttle and right when i go into any gear but after about 1 or 2 seconds it gets higher pitched and then stops, speaking of whistling i was up in MN a while back in my civic and this guy with the exact same car(his was si cuz it wasnt made in canada) had a horn that whistled like you would whistle at a good lookin girl. i figure he was just sayin nice car