The GT90 featured some very impressive stats: a top speed of 250 mph, 720 horsepower, and a V12 engine with FOUR turbochargers. The exhause from this monster engine was so hot ceramic tiles developed by NASA were required on the rear body panels to keep them from being damaged by the heat.
This car was the spiritual successor to the popular GT40 race car that Ford developed in the 1960's. That could would eventually get a production successor, which is the Ford GT.
The GT90 was developed over a period of 6 months and borrowed parts from another that was part of the Ford family: the Jaguar XJ220. That car was put into production, to mixed reviews.
Although just a concept car, the final prototype was raced on track and was a beast of a car. Ford's CEO was so proud of the achievement that he kept a model of one on his desk. Models of this car are still quite popular with fans. You can probably find a couple listed on eBay right now.