This heavy-duty alloy rear upper arm bulk is an upgrade replacement for Kyosho Mini Inferno ST and Mini Inferno 09 models. It mounts at the front gearbox area to accept the rear upper arm link points and is supplied as a single metal unit with mounting hardware for a straightforward swap.
The part secures the upper arm mount and increases rigidity at the gearbox interface, helping to cut down on unwanted movement. Installing an alloy bulk in place of the original plastic piece typically reduces deflection at the pivot and can provide more consistent steering and suspension behaviour during spirited runs.
Fitting should be simple for builders familiar with Mini Inferno service. Remove original retainers, move over any bearings or links, install the alloy bulk with the included screws, then check steering clearance and suspension travel before finishing the job.
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