GRX is a anime/manga thing
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The fastest car on Earth. In order to drive so quickly, a special drug is needed to survive.

Top speed: 400 km/h (250 mph) vs. 350 km/h (219 mph) as indicated on the speedometer of the Mach 5.
General Information Edit
Thing Name GRX
Japanese Name:
Romaji Name:
1st manga book:
1st anime episode: Speed Racer #20
1st anime movie:
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