I did not make it to the track because it started raining in my area, and didn't want to risk driving 100 miles total for nothing.
But that was a modded E39 M5.....we wanted to race a stock E60 M5! We wanted to validate Slfgator's story that the 335 can hang with the E60 M5 up to 100mph.
I've beat stock E39 M5s at the track.