With this CETE Automotive exhaust valve control module you have the ability to better control your exhaust valves for specific situations. The controller allows you to keep the exhaust valves open or closed fully through factory controls. The exhaust valves will also automatically be set to mode the car was shut-off in. Built in safety measures won't allow the exhaust valves to remain closed above until 5000rpm. The full factory control system stays intact and functional, plus no added key fobs or controls are needed.