AERPRO 4 Channel Line Output Converter AP3044A FD758 Compatible with Vl Commodore Nissan Skyline Compatible with Vl Commodore Nissan Skyline R31 86 88 R Rh Auto a Temperature Probe (Air or Coolant Fitment) senses air temperature as it passes through the radiator with the sensor placed in the radiator fin section or the sensor can also be placed directly into the coolant system in combination with a Temperature Sensor Adaptor Kit (Part 0409) which is available from our store Aerpro Line Output Converters will convert your existing cars factory head units high level (speaker output) into a low voltage line level (RCA) output allowing you to add on an aftermarket amplifier to an OEM headunit