Wideband O2 Systems

What is a wideband O2? A wideband O2 reads air/fuel via its own O2 sensor that you install in your exhaust (you either need to weld in a bung, or some aftermarket systems such as Turbo XS have additional ports for them). The difference between a wideband O2 and narrow-band O2 (Autometer, Defi, etc.) is that the sensor reads from 0-5 volts rather than 0-1, giving you a much clearer view of your air/fuel instead of the light show afforded by narrow-band gauges.