GM claims the all new Grand Sport is as fast around the Milford Proving Ground test circuit as the C6 ZR1. Considering the near 150 horsepower deficit the Grand Sport has that is something special. The lightweight Grand Sport is fitted with Michelin Pilot Super Sport tires. With 285 mm up front and 335 mm in the rear its melded to the tarmac. A full revamp of the stabilizer bar, springs, and dampers come along with a set of massive Brembo brakes. On offer is a seven-speed manual and an eight-speed automatic. If that isn't enough, opt for the Z07 package which brings carbon ceramic brakes and Pilot Sport 2 Cup Tires. The Grand Sport will be available in both coupe and convertible configurations.