8. GM Firebird Concepts
Although they presented the first Pontiac Firebird in 1967, General Motors already used the name on four popular concept cars in the late ’50s. They named it the GM Firebird I to IV, and they were show cars with rocket-inspired styling, big fins and advanced equipment. The first Firebird had a jet engine and was basically an airplane on wheels. Later cars were a bit more conventional, but they still were crazy.
GM marketed all Firebird concepts as cars of the future with numerous insane features. They included a TV on the dashboard and outboard drum brakes. Some car historians claim those concepts were fantasy cars GM never intended for production, only serving as attention-getters for car show crowds.