The Plymouth Superbird and sister model the Dodge Daytona were the last step of the muscle car race, a race in which manufacturers Ford, Chevrolet and Dodge took part, each trying to out do each other for power and speed.

The Superbird was only sold for one year, 1970. Once the Plymouth Superbird hit the professional race circuit it dominated so overwhelmingly that restricions were put in place which excluded it from competition, and without the publicity of the race track its production was ceased.There were 1,920 Superbirds built during this time.

The Superbird featured a two foot high rear spoiler which made little or no difference to the aerodynamics of the car under 90 mph. The Superbird also wore an elongated nose section designed to cut through the air.
These features combined are the reason the Superbird is one of the ugliest designs of all time.
Fast though.