Speedart sport exhaust w/o tips Porsche 997 turbo

997 turbo sport muffler with 200 cell cats for deeper throaty sound and weight reduction adding 15hp based on European dyno. The speedart 997 turbo with just the mufflers made 507hp to the wheels. Uses stock tips. Ecu update adds extra to maximize for increased air-flow. Approximately 540hp. Image shown has the system with the tips but they are not included. These mufflers use the factory tips.