The AWE AFM Valve Simulators allow drivers to equip full AWE Cat - back Exhausts without the worry of throwing a CEL. Simply remove the AFM valve motors from the factory exhaust, bolt them onto the AWE AFM Valve Simulator, and secure them safely to the vehicle. Once installed, the AFM valve motors will retain their factory operation, and keep your cars ECU happy. AWE AFM Valve Simulators come as a set of two, and require the use of the factory valve motor hardware to secure the AFM motor to the AWE Valve Simulator plate.