Wideband O2 AFR ModuleThe Banks Wideband Air Fuel Ratio (AFR) Module kit allows you to add the included wideband O2 sensor to an existing Banks iDash and Analog Module network. Monitor or record O2 data with the Banks iDash for use in engine development, tuning, or for track events. Includes Banks AFR Module and Walker oxygen sensor. iDash and Analog Module Kit sold separately.