I bought a set of dual, chrome, air horns with 159 db's off Ebay, for $36.00. The compressor and tubing are included and the will work off of your stock horn button, that is already relayed. They even make the cows out in the field take notice.The more d b's the louder the horns are. If you want them to hear you coming, you need to take off the exhaust chamber and put straight pipes on it. I believe that loud pipes save lives. I know that they will make people quit texting long enough to look.