unfortunately, it sounds pretty pathetic just like the stock e60 m5. Can you say 3 cats on each bank along with resonators? Derek Fisher (too bad he got traded) lives around me and has a 760li. he drives by all the time. He was at East Bay BMW when I had the E39 in for service. he heard the tubi's, came in and asked who's car it was. He asked me where he could find an exhaust for the 760 since it sounds pretty wimpy..