Chassis C5R-012 was built purley to serve as testing and development car the new C6.R generation race car. Its first test on-track was in 2003 with Ron Fellows and Johnny O’Connell handling most of the testing. C5R-012 was also the car drove on stage by Ron Fellows wearing the body of the C6.R at the 2005 North American International Auto Show to debut the new Corvette Racing machinery.

Chassis C5R-012 never raced by Corvette Racing and only served as a test mule. Once testing had concluded it was sold and renamed to C6R-012, which still competes today in historic racing events.