Plymouth Roadrunner Superbird
Like the Charger Daytona, the Plymouth Roadrunner Superbird was a very popular muscle car. It had everything that the Dodge Charger had but with a bit more style. The Superbird was made famous by Richard Petty and it won quite a few different race championships and awards (via Autowise).
When you bought this car new you were essentially getting a street-legal NASCAR. Because of the car’s notoriety on the track the initial sales numbers were great. The marketing campaign for the car utilized the road runner character that was featured in the Looney Toons cartoons.