Mugen MBX joint cup by Arrowmax AM-MBX-E0225  [AM-MBX-E0225]

Joint cup for Mugen MBX

This Arrowmax AM-MBX-E0225 joint cup is an RC-scale driveline component intended for use on Mugen MBX chassis. Machined from 7075-series hard aluminum, the part is presented as a direct replacement or upgrade for the joint cup used in the MBX driveline assembly. The description focuses on fitment, material, and the role the cup plays in maintaining driveline alignment and wear characteristics during normal running and competition tuning.

In practice, a joint cup locates and retains the drive pin or dogbone end inside the hub assembly. When replacing factory cups, verify fit and orientation before final assembly and torque fasteners to the chassis maker's recommended values. Use this part as a tuning or maintenance item to address wear or to change the feel of the driveline under load.

Use this joint cup where a stronger, heat-treated 7075 cup is needed for maintenance or incremental driveline tuning on MBX platforms; confirm fitment against the chassis manual before installation.