This front lower suspension arm fits the TAMIYA DT-03 chassis and is offered as model JR-DT300-OR. The part is machined from anodised orange aluminium to replace the stock plastic lower arm while matching DT-03 mounting points.
Functionally the aluminium arm reduces flex at the suspension pivot, improving the repeatability of small setup adjustments. It is intended to be used with standard DT-03 suspension components and ball cups; check existing fasteners and ball stud alignment prior to installation.
Installation advice: transfer original mounting hardware where suitable, align the arm with the hub carrier and steering linkage, tighten fasteners to a moderate torque to avoid damaging threads, and verify suspension travel and steering clearance after fitting.