AWE SwitchPath™ Exhaust for Porsche 991 - Non-PSE cars - Chrome Silver Tips3025 41010 This is the finest exhaust available for the Porsche 991 Carrera S and 4S available. Period. The AWE SwitchPath Exhaust for the Porsche 991 is for those looking to increase power and bring out the note of their 3. 8L powerplant, without turning their backs on perfect daily drivability and Porsche sophistication. Track and Touring, all in one elegant SwitchPath Exhaust. The AWE Tuning Porsche 991 SwitchPath Exhaust includes integrated valves