I stand corrected it was not a new race record but a new qualifying record.
http://www.sfrscca.org/Results/20051001/gq5.htm
You will notice that the next fastest car was 2.2 seconds back and was on Hoosiers.
Most of the top ITS cars are running Hoosiers in SFR.
Laguna Seca has to have just the right conditions to run at the Race Record pace.
I have been within a .5 second of record race pace but everyone else was fast that day also.
The BMW set a new Q record on a day when the track was slow.
The evidence is in the close lap times of the other 7 ITS cars.