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Optional high speed gear set from HPI Racing for the RS4 Sport 3 on-road cars. It gives you more top end than the stock spur and pinion setup, changing the stock gear ratio from 8.53 to 3.70. Hardened plastic. YOU GET: 53T spur gear 44T pinion gear NEEDS: HPI Plazma 3S LiPo battery #106401. HPIC6402 is recommended for extreme high speed with this gear set. WARNING: Built for high-speed running only. Not recommended for repeated stop and start driving.
