Innovate Motorsports (3845) MTX-L Wideband Air/Fuel Ratio Gauge Kit for Powersports, Bosch LSU 4.9 Patented DirectDigital wideband sensor control, 100% digital wideband air/fuel ratio technology! 52mm (2 1/6) diameter gauge body Digital display in AFR or Lambda Bosch LSU4.9 Wideband O2 Sensor is compatible with all fuel types (Leaded, Unleaded, Diesel, Methanol, E85, etc) Ability to calibrate O2 sensor for increased accuracy