CERV-IV
On December 1992, General Motors' Corvette group secretly contracts with TDM, Inc. to build a test car of the 1997 Corvette, which was officially called CERV-4 (Corvette Engineering Research Vehicle). Corvette directed the project, with Chevrolet paying for it. General Motors management was not told about it, for fear of cancellation. It was unveiled by Corvette chief engineer Dave Hill on 1993-5-3 at the General Motors Technical Center in Warren. The build cost was about US$1.2 million.
Read more about this topic: Chevrolet Engineering Research Vehicle (CERV)