This replacement set supplies front and rear upper arms for TAMIYA Thunder Shot, Thunder Dragon and Fire Dragon chassis, supplied as a 2-piece black pair. The components are aluminum and intended to be direct-fit upgrades using the original mounting points.
Fitting guidance: the arms replace factory plastic pieces on compatible Thunder buggies and typically attach at the same hinge points with existing hardware. No special tools are required in common installations; confirm that pins and screws are suitable before final assembly.
Tuning impact: aluminum upper arms increase stiffness compared with plastic, which influences suspension response and load transfer. Use them to reduce arm flex and stabilise handling, then revisit shock and alignment settings to refine balance.