1969 Plymouth Duster I

A sure show stopper, the topless Road Runner concept car for 1969 was called Duster I, and came fitted with a 426-cubic inch Hemi-head engine that produced a whopping 425 horsepower. A built-in roll bar adjusted to match high-speed racing, and spoilers located in the rear quarter panels opened to prevent side-to-side yaw when slipstreaming. Smaller front rock shield spoilers helped to reduce frontal lift. Built on a shortened Road Runner platform, the wheelbase was reduced 16-inches to an even 100 inches, and the car rolled on large H60 x 15-inch tires.

RACY ROAD RUNNER – The Plymouth Beep Beep X-1 a high performance concept of the popular Road Runner muscle car – is being shown in the Plymouth exhibit at auto shows. The Beep Beep X-1 is a two passenger model with a 426 hemi engine under the hood. The one-of-a-kind car is built on the 100-inch wheelbase instead of the 116 inch wheelbase of the standard Road Runner