What is the parts interchangability for a B6 1.8T to a B7 2.0T like, specificallyin the area of exhaust?

 

after looking at a few pics, it seems that the b6 and b7 are compatible but not b5. either way i think you are better off going custom. it'll be much cheaper. just find a pair of mufflers you like (check youtube for sound clips) and have the piping custom bent cat-back to the mufflers. check out google to find a muffler shop in your area.