Production on the Sol-Aire CX4 began in 1984, when Hot Wheels needed a new car to enter in the 24 Hours of Le Mans. The car was powered by a 6.4 liter V-12, initially producing 687 horsepower. After further development, however, the engine was able to produce around 920 horsepower, thanks to lighter internal components. Handling was also improved in 1992 by greatly reducing the weight of the chassis, which was achieved by switching from die-cast iron to high-strength plastic. In 1998, a special edition CX4 was produced with a blue leather interior, a United States flag decal set, and limited-production white wire-spoke rims.
Other features include: