Category Review: Performance Gauges and Sensors Performance gauges and sensors are essential tools for any serious car enthusiast or mechanic. They allow you to monitor your vehicle's performance in real-time, which can help you identify potential problems before they become major issues. In this review, we will take a closer look at some of the best performance gauges and sensors on the market today. AEM Digital Flex Fuel Wideband Failsafe Gauge W/ FF SENSOR: This gauge is designed to provide real-time monitoring of your vehicle's fuel system, including air/fuel ratio (AFR), boost pressure, and more. The wideband failsafe sensor ensures that the gauge can accurately measure AFR across a range of temperatures and conditions. Overall, this gauge is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM 30-4406 Turbo Boost + 30-4401 Oil or Fuel Pressure Digital Gauge Kit Set: This kit includes two digital gauges that provide real-time monitoring of your vehicle's boost pressure and oil/fuel pressure. The turbo boost gauge is designed to accurately measure boost pressure across a range of temperatures, while the oil/fuel pressure gauge provides accurate readings for both systems. Overall, this kit is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM 30-4910 Fuel Failsafe Gauge: This gauge is designed to provide real-time monitoring of your vehicle's fuel system, including AFR, boost pressure, and more. The wideband failsafe sensor ensures that the gauge can accurately measure AFR across a range of temperatures and conditions. Overall, this gauge is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM Water/Methanol Failsafe Device - Metric 4mm 30-3020M: This device is designed to provide real-time monitoring of your vehicle's water and methanol systems, including temperature and pressure readings. The metric sensor ensures that the device can accurately measure these parameters across a range of temperatures and conditions. Overall, this device is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge: This gauge is designed to provide real-time monitoring of your vehicle's air/fuel ratio (AFR), including wideband readings for accurate measurements across a range of temperatures and conditions. The X-series sensor ensures that the gauge can accurately measure these parameters, while the UEGO AFR sensor provides reliable readings for both gasoline and diesel engines. Overall, this gauge is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM Digital Flex Fuel Wideband Failsafe Gauge W/ FF SENSOR: This gauge is designed to provide real-time monitoring of your vehicle's fuel system, including air/fuel ratio (AFR), boost pressure, and more. The wideband failsafe sensor ensures that the gauge can accurately measure AFR across a range of temperatures and conditions. Overall, this gauge is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM Digital Wideband UEGO AIR/FUEL Failsafe w/Boost & Oil/Water/Transmission Temperature 2 Gauge Kit: This kit includes two digital gauges that provide real-time monitoring of your vehicle's air/fuel ratio (AFR), boost pressure, oil temperature, water temperature, and transmission temperature. The wideband failsafe sensor ensures that the gauge can accurately measure AFR across a range of temperatures and conditions. Overall, this kit is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM (30-4110) UEGO Air/Fuel Ratio Gauge: This gauge is designed to provide real-time monitoring of your vehicle's air/fuel ratio (AFR), including wideband readings for accurate measurements across a range of temperatures and conditions. The UEGO sensor ensures that the gauge can accurately measure these parameters, while the metric sensor provides reliable readings for both gasoline and diesel engines. Overall, this gauge is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. AEM 21-2036DK Universal DryFlow Clamp-On Air Filter: This air filter is designed to provide clean, efficient air flow to your vehicle's engine, improving overall performance and reducing the risk of damage from contaminated air. The clamp-on design ensures that the filter can be easily installed without any modifications to your vehicle, while the round straight flange provides a secure fit. Overall, this air filter is well-designed and easy to use, making it an excellent choice for anyone looking to improve their vehicle's performance. In conclusion, these are some of the best performance gauges and sensors on the market today. Each product is designed to provide real-time monitoring of your vehicle's performance, allowing you to identify potential problems before they become major issues.