SONOMA  Calif – The General Motors Chevrolet Corvette C5-R will celebrate its 50th race this weekend at Infineon Raceway in Sonoma  California Since 1999  the legendary sports racing car has won 29 races in 49 events  including an overall victory at the 24 Hours of Daytona  three GTS victories at the 24 Hours of Le Mans and three ALMS GTS championships