Thanks to all for the info on air horns, looked at Rivco, friends have them on bike, wanted something cleaner, did not like the trumpets showing. Checked Kuryakyn, not air horns,my son has MoCo on his 06 FLHTCUSE, not crazy about the looks, and the sound is just OK. I took the advise of some of the members and ordered the Mini Beast----- All I can say is WOW!! install very easy, clean looking (for an airhorn) and it is LOUD!!!!!!!!!!! Thanks for the info, I couldn't be happier!!