In the first season of Grand Am competition there were five classes but in 2005 the series had reduced the number to two categories:

• Daytona Prototype (DP): This class was introduced in 2003 and was established to replace the two existing Sports Racing Prototype groups. To control costs, the cars used a tube frame chassis rather than the expensive composites used to construct most prototype race cars. Also, expenses were contained by limiting modifications and implementing rules that would be in place for five years. Approved to produce the first generation of Daytona Prototypes - for a cost of approximately $400,000 were: Riley Technologies, Doran Designs, Crawford Race Cars, Fabcar Engineering, Chase Competition Engineering, Picchio and Multimatic. Costs were also controlled by restricting the engines to production based motors supplied by Pontiac, Lexus, BMW, Porsche, Ford and Infiniti. Engine displacement was used to determine the weight of a car and whether a five or six-speed transmission could be utilized.
• Grand Touring (GT): In 2004, there were two production-based classes: Grand Touring and Super Grand Sport which initially competed in the Grand Am Cup division. These two categories were combined into a single class in 2005. Participating in this group are manufacturers such as Porsche, BMW, Chevrolet, Mazda, Ferrari and Pontiac. As with the Daytona Prototypes, engine displacement was used to establish the weight of different makes and models.

As in the past, the season opened in January with the Rolex 24 at Daytona International Speedway and ended in Utah at Miller Motorsports Park. In between these two venues, there were events held at Autodromo Hermanos Rodriguez, Homestead-Miami Speedway, Mazda Raceway Laguna Seca, Lime Rock Park, Watkins Glen, Barber Motorsports Park, Mid-Ohio, Virginia International Raceway, Montreal, Iowa and Infineon Raceway. New for this season were Montreal and Iowa and gone from the schedule was Long Beach and Phoenix International Raceway. There was a total of fifteen events with the series competing at Daytona and Watkins Glen twice.

Round four of the 2007 Grand American Road Racing Championship was conducted at the Mid-Ohio Sports Car Course. Competitors in the Daytona Prototype and Grand Touring categories would compete in separate races. This was the third of five weekends in 2007 where the two classes would not be combined. Each race was scheduled for two-hours, thirty-minutes around the thirteen-turn 2.258-mile road course.