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1951 Buick XP 300

1951 Buick XP 300 "Envisioned by Charles Chayne, head of GM Engineering at the time, the Buick XP 300 was conceived as an experiment in styling and engineering. The lightweight aluminum body and skirted rear wheel openings make the XP 300 appear as if it is floating. Coupled with a high horsepower engine, Charles Chayne himself tested the XP 300’s performance by reaching more than 140 miles per hour during an engineering test run." -- General MotorsGeneral Motors