I recently purchased my 2005 Cayenne S with this installed. Its a lot smaller and possibly lighter than OEM and has a nice chromed finish. I doubt it is Fabspeed....the tips say Sebring Tuning - but I think they are separately installed. The sound has that cool, Marine V8 growl:

 

I don't think anyone will really able to give you an answer from looking at the tips. Will really need a shot of the muffler/exhaust. Just my 2 cents.

 

Well, I cleaned them up and finally found out they are indeed Sebring Tuning exhaust, in twin 14-inch 304 stainless cans. The sound has a deep, bass-like rumble, transforming into that precision sewing-machine growl in the higher revs....it's almost intoxicating.

 

Other than looking like they hang down pretty low, they look good.

 

same company that was stamped on my lorinser exhaust for my old Mercedes.