MST RMX Rear Shaft Ball Differential Set (40-13) - MXS-210520 ARA550071 This Kit Features An Updated

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MST RMX Rear Shaft Ball Differential Set (40-13) - MXS-210520 ARA550071 This Kit Features An UpdatedThe MST RMX Rear Shaft Ball Differential Set is an upgrade for the RMX 2. 0 S, as well as the RMX D kits equipped with the optional 4WD conversion (MXS 210452). Package includes precision machined outdrives, and the rest of the parts to build one complete ball diff with 40 13T gearing.