[Chuck Jones]

PSE is Porsche Sport Exhaust....I don't recall when it was first offered on the cars, but it's actually a dash controlled solenoid that opens and closes a bypass that gives you a sporty versus a more modified and "civil" sound for those of you who had strict CCR's or *****y neighbors who complain. The PSE exhaust is one of the best sounding (IMHO) of those offered out there and it gives you the additonal option of several sounds....which the others don't give you.