Innovate Motorsports 3802 G3 Complete Wideband Gauge Kit (2 1/16 52mm) with LC-1 O2 Sensor, Bung and Plug Wideband Controller and O2 Sensor compatible with all engines and fuel types Air/Fuel Ratio Range is 8 to 18 - Wide range Auto calibration capability to compensate for changes in temperature, altitude, and sensor condition