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HPI Pro 4 parts, upgrades Parts, aluminum hop up parts. Replacement parts for your HPI Pro 4 Touring Car in stock. Buy HPI Racing Spare Parts at rcMart
The HPI Pro 4 is a 1/10 scale radio controlled touring car manufactured by Hobby Products International (HPI). It features a centre propshaft to transfer the power from the motor to the rear and the front ball differentials. The gearbox features a bevel-and-ring gear design, and is made of graphite-reinforced plastic.