The MPC Hose Insert is designed to insert both the fan switch and temperature sensor into the cooling system on your K swapped vehicle. The adapter is threaded, so OEM sensors can be easily swapped over to your newly equipped K series vehicle.
This allows your cluster temp gauge to read properly, and your fan to kick on at the correct temperature.
For your OEM sensors to get a correct reading, they need to have a good ground. The MPC Hose Insert features a threaded grounding post, so that a ground line can be run from it to the chassis to ensure proper function of the temperature sensors.
Without our adapter, you would have to drill and tap your engine/radiator for proper installation of these sensors.