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Parts/Suspension & steering/Suspension arms & hubs/RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)
RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)
RPM

RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)

Part # RPM815223.7(3)
Suspension arms & hubsLandcraft
Fits
Arrma KratonArrma Outcast
Where to buy
$24.99
AMain Hobbies
Seen Oct 12, 2026
$24.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This is an optional set of Arrma 8S BLX Front Left Upper and Lower Suspension Arms, intended for use with the ARRMA Kraton 8S & Outcast 8S kits. 

The ARRMA Kraton 8S and Outcast 8S are each 26 lbs. (12kg.) of RC bashing fun. That's alot of weight to throw around, and if the A-arms aren’t up to the abuse these massive monsters can dish out then RPM has got your back! These replacement front A-arms are designed with the backyard basher in mind and can handle some serious abuse and come back for more.

Features:
  • Lighter than stock by 4.5 grams per upper / lower a-arm pair
  • Replaces the front left upper A-arm from stock ARRMA #ARA330561
  • Replaces the front left lower A-arm from stock ARRMA #ARA330589
  • (One vehicle will require 1 – #81522 & 1 – #81562 for completion of the front end)
Notes: RPM A-arms for the ARRMA Kraton 8S & Outcast 8S are sold as one upper and one lower in each kit. One left (#81522) & one right (#81562) will be needed to complete the front end of one vehicle. RPM A-arms replace the upper A-arms from stock ARRMA #ARA330561 and the lower A-arms from stock #ARA330589.
Like stock A-arms, RPM Kraton 8S versions are sold without threads. If the pivot ball hole is difficult to thread using the pivot ball, RPM recommends thread tapping (tap not included) the hole for 3 – 4 threads, but do not tap any further. Additional cut threads will negate the thread-locking capability of our materials.

Reviews3.7 · 3 reviews

John ScheinbergVerified owneron RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)

Much better than stock! Also you may need a drill. For the 4 sway bar grub screws. Threading in the pillow balls isn't too tough, just set the arm on a table and hold with one hand while screwing in (can use an.upper arm bolt or hinge pin through the pillow ball hole as a cross brace to screw it in, no extra tools)

Matthew TaylorVerified owneron RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)

Buy these immediately for your Arrma 8s truck! The factory arms are brittle and weak. These also remove a lot of the slop in the suspension. They are not easy to install, but are quite worth it.

Robert SnyderVerified owneron RPM Arrma 8S BLX Front Left Upper & Lower Suspension Arms (2)

RPM warranty is a joke, products are not great but are better then stock, but if you jump your cars at all the warranty will be voided.

What reviewers say

Reviewers generally find these arms stronger and less sloppy than the stock Arrma 8S BLX parts. Installation is described as fiddly: one reviewer notes that the four sway bar grub screws need a drill and that threading the pillow balls takes some workaround, while another calls installation difficult but worth it. The main complaint concerns RPM's warranty, which one reviewer calls poor and says is voided if the vehicle is jumped. Ratings are positive overall, with one 1/5 review focused on warranty rather than product performance.

  • + Stronger than stock arms
  • + Reduces suspension slop
  • + Better than factory parts
  • − Difficult installation
  • − Requires drilling sway bar grub screws
  • − Warranty voided by jumping
Summary generated from the reviews above.

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