WHP Wideband Oxygen Sensor Kits allow you to use the on-board wideband oxygen sensor controller in the ECUMaster EMU Black. Accurate information is vital to engine performance and tuning, and the Bosch LSU 4.9 wideband oxygen sensor is a reliable and accurate sensor. Note: The EMU Black can control either a 4.2 or 4.9 sensor. The EMU Classic can only control a 4.2 sensor. What's in the box? Bosch LSU 4.9 Oxygen Sensor
