I have a 99 2.8 A4 Quattro and I'm looking into replacing my exhaust system w/ a performance cat back system. After I replace the exhaust will I need to take the vehicle in to get it calibrated so that the car will run smoothly? Secondly I want to get a body kit put on my car. How hard is it to work on myself, or should I have it taken care of by pro's?
Audi Shwaat
keywords: audi a4, audi, audi-mobiles