"I have to comment on the recent installation of a Borla Cat-Back Exhaust for a 2001 Audi TT Quattro. In one word, EXCELLENT. This had to have been the easiest car project I have done in years. The old system was removed and the new Borla system installed in about a 1/2 hour. Alignment and fit was great — a well engineered product. I look foward to years of use."