Founded in 1966 by Hank Manley, Manley Performance Products began life as Manley Speed Equipment, with a product line that included stainless valves, forged pistons, and several internal engine components.

This is a RACE ONLY product manufactured and sold for installation on vehicles to be used solely for competition purposes, which, once installed, may never be used, or registered or licensed for use upon a public road or highway. If you install this part on your vehicle and use that vehicle on a public road or highway, you will be considered in violation of the Clean Air Act and personally subject to a civil penalty of $4,454.

AEM's Wideband UEGO (Universal Exhaust Gas Oxygen, pronounced “You-Way-Go”) Controllers are powerful, cost-effective tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of an engine. AEM was the first company to release a wideband air/fuel ratio gauge with its Classic Digital Wideband and delivers the fastest-responding wideband air/fuel controller with its patented X-Series wideband technology, which allows you to see AFR changes other controllers may miss. Both wideband air/fuel ratio gauges are 52mm to fit standard gauge pods and include everything you need to install them. Both wideband gauge designs include outputs to transmit AFR data to a logging device or engine management system. If you do not need an air/fuel ratio gauge, the X-Series Inline Controller is ideal for users who only need AFR data for logging, feedback control, and/or transmitting to a dash display. AEM also offers wideband sensors, bungs, and no-weld installation mounts to satisfy the installation needs of everyone from the weekend racer to the professional. When you want the best tune, you need the best air/fuel controllers. Trust AEM, the pioneers of the wideband gauge.