McLaren released pictures of an one-off model built by McLaren Special Operations and it is called X-1. X1 is a MP4-12C with a personalised unique design for a very respectful McLaren customers. X1 shares the same technical details with the MP4-12C but looks totally different.
During the design process, customers had a meeting with Frank Stephenson to discuss about the design. Also, customers asked cues from iconic cars from the past (1961 Facel Vega, 1953 Chrysler D'Elegance Ghia, 1959 Buick Electra, 1939 Mercedes-Benz 540K and 1971 Citroën SM).