Gauge Series Features: • Black face gauge with magnified Tinted Lens • Brushed Aluminum Trim Ring • Green, Yellow & Red LEDs • Gauge visor • Mounting and Installation hardware • Instructions • 2 1/6 in gauge or 52 mm in diameter

Air / Fuel Ratio Gauge Includes: • All mounting hardware • Detailed installation instructions • Gauge Visor • Reads: Lean to Rich • Electrical Gauge • Free Tech Support • 12 month limited warranty

This Air to Fuel ratio gauge is one of the most important gauges that are needed when modifying your car. Air/Fuel ratio gauges properly measure the lean to rich mixture of the engine. There are many different reasons that cause an engine to run rich or lean, and with this gauge you can accurately determine the proper mixture of your engine. It also measures the presence of oxygen in the exhaust and it connects directly to your narrow oxygen sensor in your car. Six green LED's showing rich, ten yellow LED's showing optimal, and four red LED's showing a lean mixture.