Arrowmax AM-MRX5-H2113 Mugen MRX-5 Rear Upper Arm Holder A  [AM-MRX5-H2113]

Rear upper arm holder for MRX-5

This Arrowmax AM-MRX5-H2113 part is an RC-scale rear upper arm holder designed for use with Mugen MRX-5 chassis. It serves as the mounting point for the rear upper suspension arm and participates directly in rear suspension geometry and linkage alignment.

Installation is straightforward for experienced hobbyists: remove the existing rear upper arm holder, verify mating surfaces and fastener sizes on the MRX-5, and reuse the original screws unless different hardware is specified by your chassis manual. Check symmetry left-to-right after fitting, and confirm full range of motion for the suspension and drive components before final tightening.

In tuning terms this component affects roll centre and camber behaviour by locating the upper arm pivot, so changes to the holder position or replacement of pre-set A/B variants can alter rear-end response. Use small incremental adjustments and test runs to evaluate handling differences on your setup.