Just do it with our Train Horn Gun Kit with 4 Trumpets! This universal kit is applicable for brushed drills. It comes without a remote control and without a remote receiver. Remote control never can be used with this kit. We included all necessary for building an extremely loud cordless horn from your impact tool. T brand tool perfectly fits our compressor and horns to build it yourself.  How to make an impact air horn? Here are simple steps: Unscrew a clamp shell Remove gears Remove drill motor Fit shell to match air compressor Connect air compressor to terminals Connect battery and doublecheck compressor works properly Screw back shell Drill 2 holes for bolts from the back side Install horns mount using 2 bolts Connect hose to the compressor and horns Enjoy your new horn!