AEM Electronics Fuel/Ethanol Content (Flex Fuel) Sensor Kits accurately measure the real-time Ethanol percentage and temperature of your fuel, ideal for programable EMS/ECU engine tuning and calibration applications.Real-time monitoring of ethanol content and fuel temperatureCompatible with AEM Infinity or Series 2 programmable ECUs or third party displays and data loggers*includes comprehensive instructions, electrical connection plug & pin kit and fuel line connectorsAEM's Flex Fuel Ethanol Content Sensor Kits measure a vehicle's fuel ethanol content percentage and fuel temperature, which allows users with programmable engine management systems (capable of tuning for flex fuel) the ability to optimize an engine's tuning calibration for the fuel ethanol content. While many fuel stations label flex fuel as E85 (85% Ethanol and 15% Gasoline), actual ethanol content can be much different. Using AEM's Flex Fuel Ethanol Content Sensor offers tuners the ability to accurately monitor the amo