The 25 Hours of Thunderhill presented by Hawk Performance and sanctioned by the National Auto Sport Association (NASA) was won today by the Davidson Racing Norma prototype at Thunderhill Raceway in Willows, Calif.The No. 17 Davidson Racing Norma driven by Brian Frisselle, Randy Pobst, Alex Lloyd and Kyle Marcelli took...

FG_AUTHORS: Series News - Pirelli World Challenge - Pirelli World ChallengeWillows, CA - The No. 24 Rotek Racing Audi TT RS won the eleventh running of the United States Air Force (USAF) 25 Hours of Thunderhill this past Sunday. Five drivers took turns piloting the car including Pirelli World Challenge...