This hard lower A arm is an RC-scale replacement made for Yokomo R12 and GT series cars where lower arm compliance is a concern. The tougher resin helps cut unwanted pivot movement during lateral loads so the chassis can better preserve intended suspension geometry through turns.
Fitting is a direct procedure for anyone used to swapping suspension links: detach the stock arm, check hinge pin and ball stud alignment, move over any required fixings, and install the new arm in the original orientation. Once fitted, re-check travel and steering geometry and clearances before use.
On the setup side, a firmer lower A arm tightens link compliance which can make turn-in crisper and handling more repeatable on high-traction tracks, but it will place additional stresses on connected parts so fine-tune springs, dampers, or anti-roll bars as part of testing.
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