Here is a video of a recent golf to give you an idea:
http://www.youtube.com/watch?v=aZ6_4Bts1mI
Sadly I do not have any rear exhaust setups ready for the mk6 jetta's, but I have done and offered up exhaust parts for the 09-10 Jetta, 09-12 JSW, and 10-11 golfs. If you or anyone is close to my shop I would love to get someone in with a new 11' jetta so I can fabricate up a high flow system for club members. Same goes for any A3 owners as well.
Good news is our Downpipes will fit all 09-12 cars including audi, jetta, golf, jsw, and the new passat.