2'' 52mm Air Fuel Ratio Gauge AFR Gauge W/ Narrowband Oxygen Sensor For Car Boat
1 Narrowband Oxygen Sensor. 1 Air Fuel AFR Gauge. Oxygen Sensor Specification Air/Fuel Ratio Gauge Specification. The instruction of the Oxygen Sensor It is suitable for 12 volt, 4 / 6 / 8 cylinder and gasoline vehicle.