For those that have done the full exhaust on the system, what make/how many boxes etc did you put on? Was thinking of changing the exhaust on the S3 and doing downpipe at the same time. Is there a problem with droning with the car or what do you suggest to do if you get that? Also, is the car much much louder than stock for normal freeway driving? I dont mind if its loud when you gas it, I just don't want it to sound like a 1300 Vauxhall Corsa with 3" exhaust.