All-new design double-shaft high torque motor created for usage with Mini 4WD professional series racers. Engine decreases power loss and offers high rate running in addition on slopes and curves. Either end of this double-shaft features push on healthier steel pinion gears for efficient energy transmission. This engine can be employed in formal Tamiya Mini 4WD events. *Compatible framework: Mini 4WD PRO show framework (never ever appropriate for Dangun or non- PRO show racers)