alright... so i have a 2.8l FWD A6 of course, and as we all know there are no exhaust kits or headers made for the 2.8... i have been searching for the ideal header design ( tube size and matching collector size ) to match the exhaust... should i go 2.25" or 2.5" with the exhaust... the exhaust will be from header back everything custom... crazy question to ask i know just thought it would be worth a try
Zuehl

 

well, the bigger the pipes the throatier and louder it will sound of course lol, i would go with 2.5 just for that reaon