This is a pair of Carisma Assembled Pro Differentials with Metal Gears for the 1/10 Scale M40S 4WD Touring Car. If you're in need of ultimate power delivery and improved durability, then these differentials are for you. This is a must-have option for the M40 series.
This direct replacement over the old plastic differential gear set allows you to use a faster motor and more powerful batteries without damaging your drivetrain. These differentials come fully assembled with grease installed.