The Challenger I is a world-speed record car built by Mickey Thompson.
The car had four Pontiac engines, four transmissions, four overdrive units, four ring-and-pinion final drives. The driver, Mickey Thompson, sat in a cramped cockpit over the rear axle.
The car was built mostly from junked and rebuilt parts.
On September 9, 1960, the car achieved the one-way world land speed record at 406.6 mph. The return run was unsuccessful and thus the record was not official.
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