The IMSA GT3 Cup is to form part of the support package for the 2007 United States Grand Prix following the announcement that a round at Indy has been added to the schedule for the new season.

The GP weekend will be one of only two meetings on the calendar that will feature two races for the field of semi-professional and gentleman drivers who will now be given the opportunity to compete on the same bill as F1s leading lights.

"This is a tremendous opportunity for the drivers, teams and sponsors associated with the IMSA GT3 Cup Challenge presented by Michelin," said Tim Mayer, COO of IMSA said. "Adding the United States Grand Prix to an already fantastic schedule for 2007 shows the commitment of IMSA, Porsche and Michelin to further grow and enhance this terrific series. It will be a joy for all of us to see more than 40 Porsche GT3 Cup cars competing on the same track as the stars of Formula One."

The largest single-make series in North America, the IMSA GT3 Cup Challenge will compete at eight different North American venues in during the season and Uwe Brettel, president of Porsche Motorsport North America said he was delighted that Indianapolis was one of those circuits.

"As the Porsche Michelin Supercup manager who brought the Porsche 911 GT3 Cup to Indianapolis for the first time in 2000, I am very excited to see IMSA go to the Brickyard with this growing series," he said. "Over the years, the GT3 Cup race car has provided the Formula One fans with great racing and a glimpse of future American Le Mans Series stars. Indy winners have included Jorg Bergmeister, Marco Werner, David Saelens, Wolf Henzler and Stephane Ortelli - all American Le Mans Series winners."