My wife hit some road debris and broke the horn in her car. When I looked into replacing it I saw an air horn kit for not much more money. It came with a pair of bugles, a small compressor and tubing and I added a relay to handle the power. They weren't as big or loud as big truck horns but still very loud. I looked forward to driving her car and finding an occasion to use them. The only problem was they only lived a couple of years. I think I saw them at Pep Boys.