I have heard the tri flow on a 00 M5 while in Greenville at the M5 experience. I did not like it. To me it made the car sound like an American muscle car rather than a high performance european sedan. I light the sound of the Tubi much more even though it cost twice as much. The Tubi gives the car that high pitch wail upon acceleration not unlike a Ferrari sounds.Originally posted by 4DRROCKT:
To those who has the tri flo system on their M5,
How does it sound compare to the tri flo system on the e36 M3 in terms of loudness?