Ford Mustang McLaren M81
This exciting car was built with the help of the well-known McLaren racing team. The idea behind the project was to take the 2.3-liter turbo engine from the regular Mustang and transform it into a street racing beast. McLaren and Ford did that by installing a tuned turbo engine with 190 horsepower, a significant number for the day (via Ford Authority).
The result has good performance, driving dynamics, and a high price tag. It was offered for sale at $25,000, which was roughly three times the price of a regular example. Needless to say, despite all the new features installed in the M81, it was a tough sell, and only about 10 were sold before the project was canceled.