2013 A6 C7 Exhaust
 

I just recently got my hands on a '13 A6 3.0TSFI and wanted to get a louder exhaust note. STaSIS costs more than a grand and I only have $400 to spend on it. Any ideas how to go about this? I want a deep tone.

Hate to break it to you, but if you want a full exhaust system, they're all going to be well over a grand. That said, I know of folks saying that they have had some success just cutting the center section of the factory exhaust out and replacing it with an X-pipe. Another alternative would be to see if someone like GT Haus would have an axle- back system for you A6.