Plug the card into your Soundbox and your analog layout comes alive with the characteristic sounds of the modern electric locomotive

Genuine Traxxas replacement part #8819

The large 6500mAh capacity provides longer driving sessions

allowing you to change your spur gear quickly and easily

Various shades of brown and grey

Robinson Racing 2640 Speed Differential Gear 40T Arrma Infraction N Accessories Plug the card into yourRobinson Racing 2640 Speed Differential Gear 40T Arrma Infraction The Robinson Racing 2640 is a speed differential gear featuring a 40 tooth count, designed specifically for the Arrma Infraction. Speed gears like this one are built to adjust your differential's gear ratio for a particular driving style. This 40 tooth speed differential gear gives Infraction owners a specific ratio option for tuning their drivetrain's overall speed and acceleration