This RC-scale replacement part supplies front and rear upper arms made for TAMIYA Thunder Shot, Thunder Dragon and Fire Dragon chassis, delivered as a 2 pcs set in black. The item is an aluminum unit designed to be a direct-fit upgrade using the vehicle's original mounting points.
Installation notes: these arms replace the factory plastic pieces on compatible Thunder series buggies and normally attach to the same hinge points and hardware as the originals. No special tools are listed here; reuse existing pins and screws when they match the original layout.
Tuning role: installing aluminum upper arms reduces arm flex compared with stock plastic arms and raises component stiffness, which alters suspension response and load transfer. Fit them as part of a broader chassis setup aimed at tightening suspension feel, and check other settings since handling will vary with the full suspension tune.
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