Take a moment and glance at the thread “My Exhaust Pipe and Bobber Build” entry #125 about dual air horns that work … no no, I mean actually WORK. If you want horns so someone will hear you …this is from my experience the best yet. Actual “AIR” horns .. not electric horns. Small motor compressor, hoses, trumpets etc …. My complaint in the past about such a set up was … unless you mount the compressor close to the horns .. there was a delay from when you hit the horn button and actually got “Honk” out of the trumpet … it was actually the half-second time it took to pressurize the rubber hose feeding the horns, it was about 4’ long. I hated the response time …soooooo on this install (I’ve done this on 4 different bikes now) this time I made up all the feed lines between the compressor and horns in copper tubing. Now it’s close to instant in its response. Check out the thread … I need to get a DB meter and get a value because ITS LOUD ! Really loud. I’ve never had to do anything but toot it, never needed a full on honk, …and it’s sound is SO not motorcycle, more like small truck ……………. BlitzMy Enfield Continental 535 had a two-tone horn--and I agree with you completely that it makes a difference because of cagers' perception that it's another car.