We had a customer drop off his CTT to us. This is a 2006 and he wanted to gain some power out of it. To me, it looks like he gained alot!  We added the Fabspeed secondary cat bypass pipes, Agency Power diverter valves, and K&N flat panel filters. Here are some pics of the install and an impressive dyno sheet. All parts for the Cayenne can be found on our Performance Store Here.