HPI Baja Rear Upper Arm BJ057 Precision Alloy Upgrade by GPM  [BJ057]

HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057
Price:
USD$39.00
Brand:
GPM
Model:
BJ057
GTIN:
4894538024517
Condition:
Brand New
Write a review
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"
alt="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057" title="HPI Baja Alloy Rear Upper Arm With Nylon Black Ball Ends - GPM BJ057"

Rear upper arm for HPI Baja assemblies

The BJ057 rear upper arm is an alloy replacement part designed for HPI Baja chassis, supplied with black nylon ball ends as specified. It is suitable as a spare or upgraded rear linkage while preserving the original ball end interfaces and mounting geometry used on Baja models.

The alloy body provides the stiffness required to maintain link geometry under load, and the nylon ball ends offer wear resistance and quieter pivot action. Installation involves removing the existing rear linkage hardware, transferring compatible fasteners when applicable, and confirming clearance at shock towers and hub areas. Verify that retaining screws engage correctly and that ball end motion is free yet secure.

As a direct upper rear linkage replacement, BJ057 will only change toe and camber if its dimensions or mounting points differ from the stock arm, so recheck alignment after fitting. Regular inspection of the ball sockets for play and wear will help maintain consistent suspension performance.

Specifications

  • Item: Rear upper arm
  • Material: Alloy body, nylon black ball ends
  • Model Number: BJ057
  • Compatibility: HPI Baja

Install BJ057 where a robust alloy upper rear arm is required on HPI Baja vehicles and carry out alignment checks after installation to ensure expected handling and fitment.

Is BJ057 dimensionally compatible with stock upper arms?

BJ057 is manufactured to match common HPI Baja mounting geometry; verify hole spacing and ball stud fit on your chassis before final assembly.

What installation checks are recommended?

After fitting, confirm that the arm clears shocks and hubs, that fasteners are secure, and that ball ends rotate without binding to ensure reliable operation.

How should I monitor service life?

Inspect ball sockets and mounting points periodically for play, corrosion or cracking and replace components when wear compromises fit or handling consistency.