13. 1987 Buick GNX
The 1987 Buick GNX flipped the script on traditional muscle cars by ditching the big V8 for a turbocharged V6. Despite its understated, all-black appearance, the GNX delivered jaw-dropping performance that left many V8-powered rivals in its dust. With lightning-quick acceleration and stealthy, sinister styling, the GNX quickly became a cult classic and a symbol of late-’80s American performance innovation. It proved that muscle could come in unexpected forms—and sometimes with a turbocharger under the hood. Read more at Road & Track.