WIDEBAND FAILSAFE GAUGE AEM is proud to introduce its Wideband FAILSAFE Gauge! (Part #30-4900). This device provides the ability to accurately tune AFR, while actively protecting your engine by constantly monitoring AFR curves and activating a user-defined failsafe strategy if it runs lean. The Wideband FAILSAFE Gauge is a Universal Exhaust Gas Oxygen (UEGO—“you-way-go”) controller […]