 According to Callaway, the C12's were built "to a standard rather than a cost" with high-profile customers such as Dale Earnhardt Jr., Otis Chandler, Andrew McKelvey, Ely Callaway, Rick Hendrick and Tommy Mottola buying the car.In Germany, the sports car model was built in Bad Friedrichshall by the "IVM Automotive" (a part of the ) as the IVM C12.The German version was available as a Coupé, Hardtop and Cabriolét.