Since the year 2000, the Grand American Rolex Sports Car Series is leading a resurgence of major-league road racing in North America. At the foundation of this success is the exotic Daytona Prototype division that is the fastest growing auto racing class in the world. Similar success has occurred for the revamped GT class that makes up the other half of the Rolex Series racing line-up. The Daytona Prototypes rules have been developed from an equal formula to produce pure-bred, specialty race cars. The GT division consists of race-prepared versions of production-based car models.

The 15-race Rolex Sports Car Series schedule features a challenging mix of endurance and sprint races, including the Rolex 24-hour opener, a pair of six-hour races and several 400K and 250 miles sprints. Holding to sports car tradition, both classes race together while competing for both class honors and the overall victory. The lone exception will be a pair of split 250-mile races where each class will run its own race.

In 2007, Porsche customer teams participated in the series with Daytona Prototypes as well as with Porsche 911 GT3 Cup race cars in the GT division. The Porsche works drivers Patrick Long (USA), Jörg Bergmeister, Timo Bernhard (both Germany), Sascha Maassen (Belgium), Emmanuel Collard and Romain Dumas (both France) started in Daytona Prototypes powered by Porsche engines and deployed by the Ruby Tuesday Championship Team, Cheever Racing and TruSpeed Motorsports. Jörg Bergmeister and Patrick Long competed the whole season with their team Ruby Tuesday Championship Racing. Porsche won the manufacturer’s title in the GT class.

The former Grand-Am Cup Series recently renamed into Koni Challenge is the showcase for the latest in international and American-made high-performance sports cars. With major modifications permitted only in the area of safety, the Koni Challenge is home to the same cars seen on streets and highways around the world every day. The cars are all required to run the same brand of tires, and strict engine and chassis rules apply.

The starting fields typically feature more than 50 production cars. Series races which average about 200 miles in length with a 3 hour time limit are primarily run as the features support events for the Rolex Sports Car Series, although Koni Challenge has stepped into the spotlight with a few feature races of its own.

Like the Rolex Series, Koni Challenge is made up of 2 classes of race cars, with Porsche vehicles starting in the GS class against competitors from Nissan, BMW, Pontiac, Cadillac and Ford. The Grand Sport (GS) class consists of race cars 3.6 litres or less, while the Sport Touring (ST) class consists of cars limited to less than 3.6 liters. No turbocharged cars are allowed. Modified Porsche 911s are the pick of many of the top Koni Challenge competitors.