Exhaust Gas Temperature is a critical indicator of the performance of a typical racing engine. Supercharged and turbocharged engines use EGT sensors rather than air/fuel sensors due to the volume of fuel being passed through the engine. Racepak's Stinger series of thermocouples are designed for use in gasoline and methanol-burning engines. These probes feature a quick reacting "hyper" tip, to ensure the quickest response time possible.