The IMSA GT3 Cup Challenge presented by Michelin is entering its third season of competition. Sanctioned by the International Motor Sports Association and in conjunction with Porsche Motorsport North America, the series gives top semi-professional and gentlemen drivers from the United States and North America the opportunity to compete with such prestigious organizations as the American Le Mans Series in the world's most successful GT3 car – the Porsche 911 GT3 Cup racer. For 2007, all competitors will field the new Type 997 cars from Porsche.

After seeing fields in excess of 45 entries in 2006, it is expected that series stops easily will see 50 cars per event as the IMSA GT3 Cup Challenge presented by Michelin continues its phenomenal growth in its third year as the largest single-make championship in North America. The purpose-built race cars, based on the Porsche 997 body style, will have sealed engines and transmissions, providing for close racing where the driver's talents are exemplified. PMNA will provide technical support for the series with personnel, parts and expertise both away from and at the track.

The IMSA GT3 Cup Challenge presented by Michelin will compete at eight different North American venues in 2007 – Sebring International Raceway, Miller Motorsports Park, Indianapolis Motor Speedway (with the Formula 1 United States Grand Prix), Mid-Ohio Sports Car Course, Mosport International Raceway in Canada, Road Atlanta and Mazda Raceway Laguna Seca – with multiple venues holding two races per event weekend.

*Signifies two 30-minute races.
**Signifies one-hour, 45-minute endurance race.