AWE Tuning Electronic Valve SimulatorsSound perfection comes standard thanks to AWE Tuning 180 Technology. Which means theres no need for exhaust valves. But when these valves are eliminated, the ECU stores what is known as a soft code in the system. While this code is not harmful, who wants it? Enter the AWE Tuning Electronic Valve Simulators. These simple devices plug right into the factory harness in place of the exhaust valves, and prevent any code from ever being stored in the ECU