Speedway's electric fan relay wiring kit comes with everything you need to wire your new Speedway Motors cooling fan. It comes complete with the 40 amp relay, wires, fuses, and 3/8" NPT brass thermostat. Non-adjustable 185° or 195° thermal switch. 3/8" NPT probe with adapter bushing. Fuse, 40 amp relay, wiring harness, thermal switch, ring terminals all included.