Plymouth Roadrunner Superbird
As one of the craziest muscle cars ever produced, Plymouth has one of the most recognizable designs ever presented to the general public. To homologate the car for racing, Plymouth built (1970 model year only) just under 2000 road-going Superbirds and sold them all over the United States (via Trust Auto).
Based on the Plymouth Roadrunner, it came with a 440 V8 as standard and the 426 Hemi as the only engine option. However, Plymouth installed a nose cone, hideaway headlights, and an enormous spoiler on the back. To make it as aerodynamically efficient as possible. Also, it transformed the rear glass from the standard concave-shaped one to regular which proved more slippery in wind tunnel testing.