I also bought the air horn for my -10 convertible and used it on the '11 as well. didnot put it on the '12 because by then it was sounding very sick. More like a duck than an air horn. so, I have purchased what is called an "auxilliary horn" by Harley that I had on my '05 Heritage. I would have scavenged it off the '05 but could not remember how to get it all apart so I just left it on. but I bought the exact same thing 6 months ago on Ebay and have not mounted it yet. it is louuuuuuuud, let me tell you folks. It is electric and mounts under the frame just above the top of the crash bar. Nice looking chrome cover and as I said, it frightens people when they hear it. However, I am still not convincded that any (that is pronounceed aaaannnnnnyyyyyyy) of the horns we have on our motorcycles truly work in all circumstances out on the open road. I had a lady just kept on coming right over into my lane as I was blowing that horn until she looked over and saw she was about to overrun a bike. I believe when people are in their luxury cars with the beautiful tunes turned up and in their own little "cage" world, they just aren't going to hear at all unless we had an atomic explosion. so, I will use this instead. at a stop, it is loouuuuudddd, but on the road, it is just a meep-meep sort of ornamental gimic posing as a legal horn. but what our bikes come with from the factory is pathetic. Whatcha think?? Pork.