18. Plymouth Roadrunner Superbird
As one of the craziest muscle cars they ever produced, Plymouth has one of the most recognizable graphics packages they ever presented to the public. The Superbird was an attempt to win the famous Aero Wars in the late ’60s to early ’70s NASCAR championship. To homologate the car for racing, Plymouth built just under 2,000 road-goingSuperbirds, selling them all over America. They based the car on the Roadrunner and it came with a 440 V8 as standard and 426 Hemi as the only engine option.
However, to make it as aerodynamically efficient as they could, Plymouth installed a nose cone, hideaway headlights, and an enormous spoiler on the back. Also, they transformed the rear glass from the standard concave shape to the regular shape, which proved more slippery in wind tunnel testing. The Superbird came with a wild graphics package along with a choice of bright colors. All cars had a vinyl roof to hide the rear glass conversion scars. They had big “Plymouth” lettering on the rear fender and roadrunner bird logo holding a racing helmet. And this was true muscle car art in its prime.