I just bought a N/A C63 to putz around in and I was considering getting a tune.
Are there any local shops that work on those? if I have to mail the ECU out I'm not even going to bother.
I heard good things about this place when I had my S4. I think they work with APR. I have not used them, decided to keep my car stock when I realized the cost to replace/repair an Audi transmission.