Sorry Chopper Dave, didn't realize some could not access that site any more. GM, there are 8 pages of posts under this topic, do you really want me bring all those over here? The bottom line is that Sibel makes an air horn that is loud, compact, much deeper tone, and works very well, I have had it on my 05 chopper for over 2 years now with no problems. Also there are many chrome ones now on the market that are identical to it in the new 2008 J&P catalog, J.C. Whitney and most other recent aftermarket motorcycle catalogs. I mounted mine in the area between the swingarm frame tubes with a small bracket attached to the passenger pegs. Just make sure that wherever you get it from that they include a relay to convert the low BD voltage to the 12v battery source. The wiring instructions from Sibel were pretty straight forward but if anyone needs help just drop me a pm and I will do my best