AST 4200s Compete in 25 Hours of Thunderhill

Congrats to the Castrol/Speed Trapp Team for running AST 4200s on their BMW 3 series. The team posted the 2nd fastest lap time in their class but unfortunately had unscheduled brake wear stops putting them back to 6th. Anthony Zwain states, "The AST's worked great and lasted the entire race without an issue, thanks! There was only one other team (the class winner) faster than our car. They had another company's triple adjustable shocks and spent about 3 times what we did in car preparation."