i just bought my 04 GTO A4 about 2 weeks ago and i have a question. i have been reading up on this forum for about the same time and it seems like a lot of folks here have been playing with the predator or the HP. now, my question is, does this void the warranty? or can you just upload your stock tune prior to sending your car to the dealer? is there a way for the dealer to know that the stock tune has been altered?
thx
Brimm
thx
Brimm