The SCT EGT Sensor Kit allows you to monitor exhaust gas temperatures with your Bully Dog BDX and GTX devices. Does not work with any GT devices. This sensor is plug & play and easy to install, featuring a stainless steel EGT probe and is RFI-shielded for accurate monitoring. 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.