The C-1 was followed by the C-2, of which three were built, all to racing specifications and so called C-2R. The C-2R's front suspension used Ford parts, while the rear suspension had Oldsmobile springs and the brake system used Cadillac components. Unable to secure a supply of the Cadillac engine, Cunningham substituted a version of the Chrysler FirePower V8 in the C-2R.
