1987 Buick GNX
The GNX was Buick’s highest-performance model in the late 1980s. It was an $11,000 option on the already speedy (and pricey) Grand National.
The cars were powered by a turbocharged 3.8-liter V6 engine that could push them from a stop to 60 miles an hour in less than five seconds. The powerplants were assembled by McLaren while the cars were finished up by ASC.
From the factory the engines supposedly delivered around 300 horsepower running 15 pounds of boost, but they are widely believed to be underrated.
The cars stickered for about $30,000 back in 1987 so it’s understandable why only about 540 GNXs were built.