Tips are slightly larger than stock.
Super Sprint (to me) is not much different than stock. Prettier tips and a little more noise at throttle.
B and B I have never heard so cannot compare.
Dinan has a very agressive note. Very noticable at WOT. Also at low RPM (1500) in gear you can get some droning. But it's not bothersome to me. I enjoy driving through parking lots and giving a little rev to set off the car alarms!
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Mark
2000 Dinan M5
2001 X5 4.4 Sport
Mark's M5 Page
X5 Page
modo2@email.msn.com