HPI Baja Rear Upper Arm Alloy with Nylon Ends BJ057 by GPM  [BJ057]

Rear upper arm compatible with HPI Baja

The BJ057 rear upper arm is crafted for HPI Baja chassis use, featuring an alloy construction paired with black nylon ball ends as listed in the model designation. It functions as a replacement link or an upgrade option while preserving the standard ball end interfaces and mounting points seen on Baja cars.

Stiff alloy material helps maintain suspension geometry under load, and the nylon ball ends reduce abrasion and operating noise at the pivots. Installation requires removal of the existing upper linkage hardware, reuse of compatible fasteners when appropriate, and checking that the arm clears nearby components such as shock mounts and rear hubs. Verify that retaining screws are correctly torqued and that ball ends move freely without slack.

Because this arm replaces the upper rear link, any change to the effective length or mounting location can alter toe or camber; if BJ057 matches the stock dimensions any handling change should be negligible. Regular maintenance should include cleaning the ball sockets and swapping worn parts to preserve predictable suspension behaviour.

Use BJ057 when you want a durable alloy upper rear arm on your HPI Baja and always confirm suspension alignment after fitting for best results.