Allows for installation of Oxygen sensors. Seals bung where O2 sensor would normally screw in. For wide-band, closed-loop applications. Sensor can read air/fuel ratios from 9:1 to 16:1. O2 Fitting Kit O2 Sensor Plug & Bung Oxygen Sensor Bung Plug This fitting kit allows for the installation of an Oxygen sensor into your exhaust system. Also it includes a plug should you need to remove your O2 Sensor.
