-
Plymouth Superbird
As one of the craziest muscle cars Plymouth ever produced, they offered the Superbird in 1970 only. In order to homologate the car for NASCAR racing, Plymouth built just under 2,000 road-going Superbirds, selling them all over America. They based the car on the Roadrunner and it came with a 440 V8 as standard and a 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, it transformed the rear glass from the standard concave shape to a regular shape, which proved more slippery in wind tunnel testing.