LMR.com is your #1 source for S197 Mustang air-fuel & wideband gauges! Wideband gauges allow you to datalog & remote tune your Mustang with precision accuracy. Utilizing an O2 sensor, these gauges monitor the air/fuel mixture to notify you if you're running too lean or rich. This allows you to correct any issues before major damage occurs. Choose from great brands such as Innovate that provide precision accuracy every time. Shop our selection of Mustang wideband gauges below!