I am also very interested in hearing about any E90 experiences at a track day. I'm signed up for my first track day this weekend (3/10/07) at Road Atlanta! I entered four autocross events last year and thought my 325i did great, even with the stock run-flats. But that's apples and we're talking oranges now...
Would love to hear about any brake or tire issues anyone has had at the track.
2013 320i, 6sp Manual, Sport Package / 2003 M3 track car