Those Boxster do look nice.
I think as 986 prices drop there will be more and more tuners from other car cultures getting into the game.
To me the exhaust sounds almost like is is running a bypassed setup, similar to PSE or Pedros.
I linked a copy of my Pedros.
http://youtube.com/watch?v=EEPv_l6GBf
and for comparison my straight pipes
http://youtube.com/watch?v=M1VI-rTaUmU
After listening to them I will say the F1 sounding exhaust does have a muffler, but I think its bypassed.