The ADAC GT Masters Championship ended at the Hockenheim Ring last weekend in Germany. This highly competitive series matches the world's top sports-car manufacturers and drivers against each other in 16 races. Callaway Competition drivers Daniel Keilwitz and Diego Alessi came to the final race weekend with a slim championship lead over the No. 5 Mercedes-Benz SLS and the No. 36 Porsche, having won three overall victories and taken six podium finishes. After the last race at the Ring, race organizers made an unexpected change to the Balance of Performance rules; these changes (an additional 15 kg of weight and a 1mm-smaller restrictor) hurt the Corvettes. The championship-leading No. 28 Corvette had to add an extra 60 kg because of its last victory at the Ring. Hockenheim is a heavy-braking circuit, and the extra weight took its toll on the Corvettes, which qualified 13th for Race 1, and Seventh for Race 2. Thirty-two competitors took the green flag under sunny cool skies in Race 1. Alessi's race was quickly over when a pair of M-Bs hit him from both sides and sent him flying into the air, breaking the left front suspension. The championship appeared to be over, until the leading Porsche and M-B experienced tire trouble; they would finish out of the points.
The Keilwitz/Alessi Corvette was repaired in time to start Race 2. The duo slowly moved the Corvette into the top three, but a late contact with a Porsche resulted in a 30-second stop-and-go penalty, ending their championship bid. The pair finished Second in the Drivers Championship, while Callaway Competition took Second in the Team Championship.