This is from 1 of the owner's at NOPI:
NOPI Nationals: Sept. 22-23
Supercar Challenge - $2000 Payout as of 6/05 ($1000 per class – winner take all) Open to all model “Supercars”.
Run your Ferrari, Lambo, Maserati, Lotus, Porsche, V-Series, Viper, XKR, R8, GT-R, NSX, LF-A, GT500, Z06, ZR1...