I just installed a Capristo exhaust systems on my 2002 360. The sound is incredible and much better than stock. I did the installation myself and even though it took me 3x than a dealer, it wasnt that difficult to do. I did not bypass the cats, and dont see a need to at this time. I purchased the new exhaust from Heiko and even though it was from Germany the overall experience was very easy. I received the unit in 5 days. Heiko is outstanding to work with he called me several times to give me status and find out how the install was going. I highly recommend him and Capristo to anyone that is looking to improve the sound of their car while receiving the best possible customer support.