MUGEN MRX5 Front Lower Arm Pivot Shaft for Tuning - Arrowmax AM-MRX5-H2105  [AM-MRX5-H2105]

Front lower arm pivot shaft for MRX5

The Arrowmax AM-MRX5-H2105 is a dedicated front lower arm pivot shaft made for the MUGEN MRX5 platform. Constructed from spring steel and treated with a titanium nitride surface layer, it helps reduce friction at joint contacts and stands up to repeated use. The unit is supplied as two pieces appropriate for one side or for paired replacements depending on how you service the car.

In-service this direct-fit wear part influences suspension feel and repeatability. Lower pivot friction improves return to centre and helps maintain consistent handling lap after lap. The TiN coating reduces binding where the shaft interfaces with plastic arms, alloy components, and retaining hardware.

Fitting advice: check lower arm alignment and inspect mating holes for excessive play before refitting. Replace both sides if you spot scoring or uneven wear, and ensure retaining screws or clips are seated correctly. Use a light RC-friendly lubricant sparingly on contact points and avoid heavy oils that capture dust and debris.