AEM’s legendary Wideband O2 Air/Fuel UEGO Gauge unites unsurpassed accuracy, speed and control with an easy to read, digital interface. This gauge-type controller features a digital LED display and sweeping LED “needle” that changes colors as AFR changes from rich to lean. The unit’s 52mm (2-1/16”) gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere. All AEM digital gauges feature a 0-5v analog output for use with data loggers and virtually any engine management system, such as the AEM EMS or FIC. AEM wideband o2 air/fuel uego gauge kit A wideband air / fuel controller and gauge interface in one unit! No free air calibration required – ever Ideal AFR monitoring tool for EFI and carbureted applications, and engine dynamometers Adjustable backlighting via a dial on the back of the gauge Does not oscillate AFR reading like narrow band sensors Two status lights for error detection and operating status Bosch sensor included, accurate to 0.1 AFR KEY FEATURES No free air calibration required – ever Accurate to .1 AFR Includes white and black gauge faces Includes black and silver interchangeable bezels Includes Bosch 4.2 sensor for optimum accuracy and reliability 0-5v analog output included for use with data loggers and virtually any engine management system 0-5v analog output Gasoline values from 10 to 20:1 AFR 0-5v analog output E85 values from 6.6 to 13.2 AFR 0-5v analog output Ethanol values from 6.14 to 12.3:1 AFR 0-5v analog output Methanol values from 4.4 to 8.8:1 AFR 0-5v analog output Lambda values from .68 to 1.36:1