Porsche 970 Panamera (V8) S/4S/GTS - Valved Exhaust with Mid-Pipes (for PSE)**If your car does NOT have PSE (Porsche Sport Exhaust), Please order This Version with the Capristo CES 3 Module for Valve Control** The iconic CAPRISTO Valved Exhaust System offers the best of both worlds through its capability to produce an aggressive exhaust note under acceleration, and a more subdued sound for city driving. This feature is possible using vacuum actuated valve flaps that open and close depending on driving conditions and input