X-Series AFR Gauge, A wideband UEGO sensor controller accurately monitors Air/Fuel ratios (AFR) during the tuning process to prevent a lean fuel mixture, which could lead to engine damage. It has combined its single-channel wideband UEGO controller and gauge display into one unit, uniting unsurpassed AFR accuracy and control with an easy-to-read interface. The Gauge-Type Wideband UEGO Controller features a digital LED display and sweeping LED "needle" that changes colors as AFR changes from rich to lean. The unit's 52mm (2-1/16inch) gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere. High temperature resistance (-30℃ to 120℃) Super toughness. 2.5 ultra-thin thickness. Sensor Type:Magnetic Induction Part Number:30-0300 0258017025 Name: O2 Air Fuel Ratio Gauge Kit APPLICATIONS:FOR , for , for , for , for , for , etc Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure