The blue wire you can just cover and never use. Each gauge comes with interchangeable black & silver bezels and black and white gauge faceplates for multiple color combinations. AEM Air Fuel Ratio Guage AEM wideband UEGO air/fuel ratio gauge kits unite unsurpassed accuracy, speed and control with an easy to read, digital interface. YouTube - AEM UEGO Air Fuel Ratio Gauge Review - AEM 30-4100 the white wire is used for DSMLINK or any kind of data logging you want to do. It unites accuracy, speed and control with an easy to read, digital LED display and sweeping LED needle that changes colors as AFR changes from rich to lean. It unites accuracy, speed and control with an easy to read, digital LED display and sweeping LED needle that changes colors as AFR changes from rich to lean. AEM’s legendary Digital Wideband O2 AFR UEGO Gauge is a wideband UEGO air/fuel ratio controller (AFR) and gauge in one. The backlighting is user adjustable to 7 colors, allowing users to easily match the Air/Ratio gauge to most factory gauge clusters. AEM’s legendary Digital Wideband O2 AFR UEGO Gauge is a wideband UEGO air/fuel ratio controller (AFR) and gauge in one. A precision high speed electronic stepper motor provides lightning fast needle movement, making the AEM Analog Wideband UEGO Gauge one of the fastest and most accurate gauges available. The 320 degrees of resolution makes it easy to see when there’s even a half a point change in ratio, giving you time to shut things down before damage occurs. Running rich can cause a loss in power, while running too lean may result in serious engine damage. X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio.

When tuning an engine, accurate Air/Fuel Ratio data is critical. AEM’s world famous Wideband O2 UEGO Gauge is a must for anyone looking to maximize engine power and safety.

Aem air fuel ratio gauge wiring 4100