This hard lower A arm is supplied as a replacement part for Yokomo R12 and GT series vehicles that benefit from reduced arm flex. The denser resin minimizes undesired pivot movement under lateral loads so the chassis is more likely to keep its designed geometry through corners.
Installation follows common suspension swap steps: remove the OEM lower arm, confirm hinge pin and ball stud positions, transfer any necessary hardware, and mount the hard arm in the same orientation. After fitting, verify travel, steering geometry, and clearance checks prior to running the model.
From a tuning viewpoint, increasing lower arm stiffness reduces link compliance which sharpens turn-in and improves predictability on grippy tracks; expect load redistribution to other suspension parts and adjust springs or sway bars as required during setup.
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