This is an optional set of ST Racing Concepts Traxxas Rustler and Stampede Aluminum Heavy Duty Blue Rear Suspension Arms, intended for use with the Traxxas Stampede and Rustler vehicles as an upgrade over the plastic stock parts. Real cars don't have plastic arms, and neither should your RC. Not, that is, if you want it to bash harder and last longer, and that's just what these CNC machined, anodized aluminum arms allow you to do. For smooth suspension operation, the hinge-pin holes are fitted with machined delrin inserts. The A-arms now come with heat-treated carbon steel polished lock-nut style hinge-pins.
Note: NOT compatible with Traxxas Slash as the Slash uses a shorter rear arm.