Several months ago my local Porsche dealership built me an exhaust for my 991.2 Carrera 2 non PSE. The system is wonderful and still works with sport button. No drone issues yet can sound like a race car in sport mode. Lots of cracks and pops when off throttle. Turbo noise is just enough so you know they are there. Very affordable compared to other systems. If interested please contact Jeff Holcomb with Reeves Porsche at 813-739-4951.