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

Rear upper arm made for HPI Baja

The BJ057 rear upper arm is intended for HPI Baja use and pairs an alloy main body with black nylon ball ends, matching the description in the model listing. It can be used as a replacement or an upgrade to the rear suspension linkage while retaining the expected mounting points and ball end interfaces.

The alloy gives the arm structural strength to hold link geometry, and nylon ball ends help limit wear and dampen noise at pivots. Fitting requires basic dismantling of the rear linkage, transfer of compatible hardware where suitable, and checking clearance around shocks and hubs. Make sure screw engagement is correct and that the ball ends pivot smoothly without excessive play.

When used as a direct replacement, BJ057 should not significantly change handling if dimensions match OEM parts, but any geometric difference may alter toe or camber so perform alignment checks after fitting. Inspect ball ends regularly and service or replace them if looseness or damage appears.

Fit the BJ057 alloy upper rear arm for a sturdy replacement on HPI Baja models and verify suspension geometry after installation for consistent handling.