The FX was like many of the Sultan specials in that it used then current production car underpinnings to support newer and sometimes better bodies, interiors and drive trains. In the case of our feature car, it was modified so extensively, a new name was needed to distinguish it from the 512M it started life as. Not only is this an interesting vehicle in detail, but it is the fourth in a series of seven nearly identical cars. Each car started life at Pininfarina where the new body was fitted to the 512 superstructure. It was fabricated out of aluminum and, where possible, carbon fibre was used for panels such as the hood, doors and wheel wells.