HPI Baja Front Lower Arm Tunable Alloy BJ055 by GPM  [BJ055]

Front Suspension Lower Arm for HPI Baja

The GPM BJ055 is an alloy front lower arm produced as a replacement for the factory plastic unit on HPI Baja chassis. It fits into the original mounting locations and is suitable for replacing broken or fatigued arms.

The lower arm positions the wheel hub and influences roll centre and camber behaviour during dynamic movement. Replacing plastic with alloy changes component stiffness and provides a firmer anchoring surface for ball studs and link points, which helps when fine-tuning handling on uneven surfaces.

Installation is similar to most arm swaps: take off the wheel and hub, remove the old arm hardware, transfer or renew link hardware if necessary, fit the BJ055 into the stock mounts, and check travel and alignment. After fitting, cycle the steering and suspension through full travel and perform a short shakedown to confirm smooth operation.

For owners seeking a metal front arm that keeps factory geometry, the GPM BJ055 is a practical upgrade to boost durability and support setup adjustments.