AEM Air Fuel, Oil Pressure and Boost Kit Looking for an all in one combo of the best gauges available for your turbo vehicle? Look no further than this AEM 3 gauge combo kit.  A wide band 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. Air fuel readings are very consistent and this AEM digital wideband gauge has a reputation for accuracy. The Boost display gauge combines unsurpassed accuracy, speed and control with an easy-to-read digital LED interface that displays boost in 1 PSI increments, and a sweeping LED "needle" that lines the edge and moves as boost from -30 to up to 35 PSI. Each gauge includes 24 color-coded (Red, Green, Yellow) LED lights that change from green to yellow to red for immediate reference to the measured parameter, and an integrated thee-digit display that reveals real-time operating conditions. Features Interchangeable black and white faceplates included for customizing gauge appearance 52mm (2-1/16") gauge housing Includes easy-to-install harness and sensor Complete stand alone gauge requires no additional sensors or programs to operate LED displays provide precise reference to critical operating conditions and alert driver of potentially damaging operating conditions Applications Universal What's in the box? 1 AEM Wideband UEGO Air/Fuel Ratio Gauge (30-4110) 1 AEM Boost Display Gauge - 30-35PSI (30-4406) 1 AEM Digital Pressure Display Gauge 0-100 psi (30-4401)Optionally 0-150 psi (30-4407) Required Sensors and Mounting Hardware Warranty AEM Warranty