hese horns were mounted on my car for 1 month, and i decided to go with a nathan air chime (1600 train horn)...they are in great condition and are easy to set up. retail price for horns are about 240$ but i am selling for 120 shipped. these horns can be heard from about 2 miles away and are stupid loud. I've made people pretty upset with these and have almost caused a couple of accidents due to how loud they are. I wired them with a switch that lets me toggle between these horns and my stock ones. compressor was mounted under the car and so were the horns. i recently bought a 2 gallon tank/compressor and mounted it in my trunk. Again 120 for horns only!