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

MRX-5 rear upper arm holder for precise geometry

The Arrowmax AM-MRX5-H2113 is an aftermarket rear upper arm holder made for use on Mugen MRX-5 platforms. It functions as the mounting point for the rear upper suspension arm and plays a direct role in setting rear linkage alignment.

Installation requires basic RC assembly skills: remove the existing holder, confirm the fit against MRX-5 mounting points and fastener sizes, and normally use the original screws unless your chassis instructions advise otherwise. After fitting, check that the left and right sides are symmetrical and that suspension movement and drivetrain clearance are unobstructed.

As part of tuning, this holder fixes the upper arm pivot which influences roll centre height and camber response. Changing holder position or swapping A/B options will alter rear behaviour, so make modest adjustments and test on the surface you run most often.