I just checked a few sport exhaust systems for the Cayenne Turbo lately and the Gemballa seems to be the cheapest.
Does anybody have a Gemballa sport exhaust (black version, not the one which looks like the OEM exhaust) on the Cayenne S or Turbo? Are you satisfied?

Most Tuners ask around 3000 Euros for their exhaust systems and this is too much for a SUV. Cargraphic even put their lettering on the heat protection plate...awful looks.

Does anybody have a sport exhaust from a different manufacturer? If yes, how is the sound and are there problems? Please only reports from owners who did not modify the cats or who installed bypass pipes, etc.
Only mufflers! Thanks!