This valve version fitted with bypass valves on the x-pipe, the target was to differentiate as much as possible loud and quiet modes. Fitting the quieter "road" mufflers the sound will be sporty but comfortable when the valves are closed, very aggressive and extreme when open. The exhaust gas follows a very short and direct route, the sound reminds of the 911 RSR race cars, with burble, pops and even flames!
Picking the "race" mufflers with this setup means to have less difference between modes. Even in "quiet mode" the sound will be deep and throaty.
The valves are to be plugged to the stock pneumatic pipes fitted as stock on the car. The valve management is handled by the ECU, that varies the opening depending on driving mode (normal, sport, sport plus), rpm and throttle opening.
With the "Porsche Sport Exhaust" package, but also available as a standalone part (information available on request), a manual bypass button is fitted on the central dash. This allows to manually control the exhaust mode.
With the valve equipped system is necessary to fit the Supersprint tailpipes.