Very little is known about the FX. The car was specially made by Ferrari for the Sultan of Brunei and is loosely based off the 512M and was designed by Pininfarina.
It uses the same 4.9 liter flat-12 engine, but the power output is unknown. Anywhere between two and eight cars were produced, but the exact number is unknown. The main feature of the Ferrari FX is the transmission, which was developed by Williams BMW. The 6-speed sequential is similar to the unit found in the William’s Formula 1 car, and supposedly cost over $1 million.