HPI Baja 5B owners, your gearing options are here! This new 18 Tooth Heavy Duty Pinion Gear gives more bottom end punch for quicker acceleration. Precision machined from high carbon steel for a smoother finish to the teeth and more precise roundness, this gear has less friction for quieter running, increased efficiency and longer life than the stock gear. Also included is a machined aluminum Pinion Gear Heat Sink that helps cool the gear and clutch for longer spur gear life.

Mounting hardware, heat sink and instructions are included.

Installing on vehicle following instructions in manual