1/2 In. Brass Air Valves Air Valves 3-Position 300psi 300psi 8-Cyl Air-Engine Digital Gauge Senders. fittings 5-Switchbox No wiring or Plumbing to do. 8-Cyl 3-Position 300psi 15mm 160watt coil (5/8") Orifice completely plumbed and wired with Digital Gauge with senders plumbed in for you - You have no work to do just plug it in the Molex Connectors and go. Comes with 5-Position Switchbox wired.