Im just running the PSE with valves open. I really really like this exhaust. Remember, valves open.

 

Congrats. As far as exhaust goes its subjective of course. The car my 911 replaced had an inline 5 cylinder with no cats.. what a sound. That 5 pot warble was the stuff of dreams. Coming to a 997.2 with PSE.. I thought it was some kind of joke that Porsche charged for PSE. Adding an exhaust bypass (which puts pipes in place of a 3rd muffler) moved the sound along quite a bit. The car sounds great now. I would take a little bit more, but I haven't been inspired to spend on making a change to facilitate that yet.

 

I've done the same thing with the bypass pipes and great improvement but like you, I could take a little bit more. Question is, how do you add "a little bit more"? Everything I've read suggests the next step is to start messing with the cats and then you get more than a little bit more. Somebody went as far as comparing it to fart can sensation.