The SCT 9817 EGT Sensor Kit allows you to monitor exhaust gas temperatures with your SCT Devices. Exhaust Gas Temperatures can be one of the most important parameters that you need to monitor on your turbocharged engine. It warns the driver of situations that are potentially damaging to the engine, and it can also be used as a guide for optimizing fuel economy. The EGT Sensor Kit comes complete with everything you will need including sensor, signal amplifier and the Livewire analog connector.