The Rolex Sports Car Series was the premier series run by the Grand American Road Racing Association. It was a North American-based sports car series founded in 2000 under the name Grand American Road Racing Championship to replace the failed United States Road Racing Championship. Rolex took over as series sponsor in 2002. It ran a mixture of classes of sports prototypes and Grand Touring-style cars. In 2003, the series debuted their custom prototype chassis, known as Daytona Prototypes, named after their premiere event, the Rolex 24 at Daytona.