While the key focus of the Detroit Auto Show I to show off current, upcoming and conceptual models, Cadillac used the opening day of the 2011 show to formally introduce the new CTS-V Coupe race car built by Pratt & Miller.The new Cadillac CTS-V Coupe race car was unveiled to the Cobo Hall crowd on a rotating platform, surrounded by a collection of new Cadillac V-Series models from which is