HPI Baja Rear Lower Arm Alloy Replacement BJ056 by GPM  [BJ056]

Rear lower arm upgrade for HPI Baja suspension

This aluminium rear lower arm is a direct-fit replacement designed to bring improved stiffness and consistent geometry back to HPI Baja buggies. It is intended as a sturdy option for repair or basic suspension tuning without changing the stock mounting layout.

The component replaces a worn plastic arm to reduce flex at key mounting points and to provide a stable surface for the hub and linkage. It is supplied as a single arm piece and pairs with standard HPI Baja rear suspension hardware when installed correctly.

Installation tips: confirm hinge pin alignment, check ball stud position, and ensure mounts line up before final tightening. Use medium-strength thread-lock on metal-to-metal fasteners and cycle the suspension through its travel to verify there is no binding. Note that moving to a stiffer lower arm may alter rear grip and should be considered alongside shock damping and sway bar settings.

For hobbyists repairing damaged suspension or wanting a firmer rear setup, this alloy lower arm offers a straightforward swap that keeps original mounting geometry intact.