WM 267319 Removing And Installing (Main) Catalytic Converter On 3.6-Litre V6 DFI Engines (Cayenne Tip, Cayenne Man): Information: Overview
WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.