Active Valve Control System (Audi S4/S5/SQ5)This module is designed to integrate with the existing driver select modes to operate the valves, once the module is installed it will default valve behaviour to be as follows Comfort Eco Mode = Closed up to 5k RPM Auto Mode = closed up to 3k RPM Dynamic = Open all the time Cold Start = Valve closed (usually open with stock exhaust) 4 Cylinder mode = Valve closed The module also offers an override to open and close valves on demand regardless of drive