Plymouth Roadrunner

The Roadrunner was a car marketed by Plymouth in the sixties and seventies. A special Plymouth Superbird version was created for NASCAR. Production versions featured a horn that made a "beep beep" sound similar to the classic Looney Tunes character. The horn was modified from a Volkswagen Beetle horn.

Motorsport
The Roadrunner and Superbird are best associated with NASCAR legend Richard Petty, sponsored by STP Motor Oil.