MUGEN MRX5 Front Upright Arm Upgrade - Arrowmax AM-MRX5-H2112  [AM-MRX5-H2112]

MRX-5 front upright replacement

This Arrowmax AM-MRX5-H2112 front upright arm is an RC-scale replacement made for the MUGEN MRX5/MRX-5 chassis family. It provides the mounting point for the front wheel hub and steering links, and directly influences toe and camber response when you tweak suspension geometry.

Installation follows standard MRX-5 service steps: remove the original upright, move over wheel bearings and any steering inserts, then refit this unit using the existing fasteners. After fitting, verify link lengths and ball stud positions to restore alignment and prevent steering bind.

When dialling in setups, this upright changes steering feel and front traction by modifying scrub radius and how wheel camber reacts under compression. Make gradual setup changes, note servo throw and steering link geometry adjustments, and test on the track to judge handling differences.