Air compressor switch and relay kit for air shifter systems used on the street or at the strip. This switch and relay will allow automatic operation of the air compressor in an air shift system with a cut in/out range of 110-140 lbs. Psi. Perfect for the rider that does not want to worry about the air pressure in the air tank. The switch installs easily onto the air tank and includes a relay, plug, wires, diagrams and instuctions on how to wire.