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

Reinforced Front Lower Arm for HPI Baja

The GPM BJ055 front lower arm is a reinforced alloy replacement built for HPI Baja chassis applications. It is intended to replace damaged or flexing stock arms while keeping the existing suspension geometry unchanged.

The lower arm locates the wheel hub and defines how roll and camber change as the suspension compresses and rebounds. Upgrading to an alloy piece increases the stiffness at the pivot points and delivers a secure face for ball joints and link attachments, aiding durability when running off-road.

To fit, remove the wheel and hub, detach the original lower arm hardware, transfer or replace link pins as required, fit the BJ055 into the stock mounts, and reassemble. After installation, inspect steering and suspension range to ensure there is no binding and that alignment matches your setup before a full run.

For off-road hobbyists wanting tougher front arms, the GPM BJ055 gives a reinforced alloy option that supports suspension tuning and extends service life while retaining factory fitment.