Hi Audi Fans! I am considering buying a 2008 AUDI A4 2.0T SPECIAL ED. AVANT QUATTRO although not too excited about going to a 4-cyl engine. I read somewhere in this forum that one can install a chip of some kind to increase hp on an A4...? Do any of you know more about that? Also, do any of you know of any major problems in this car? (used car shopping is a bitch!) Thanks for your insight.