Why exactly would you call it a kit car? Just because it uses a Mercedes V12? Most kit cars I know of aren't made by supercar companies(ie. Pagani), don't cost $500,000+ dollars, and don't go through the kind of R&D that the Pagani Zonda's(in all of their iterations) do. It is in fact a production car, not one that Pagani sells kits for that people can buy and make their own car.