Kyosho Mini Inferno ST / Mini Inferno 09 rear upper arm bulk for front gearbox by GPM MIF012A  [MIF012A]

Alloy rear upper arm bulk overview

This alloy rear upper arm bulk is an RC-scale replacement part produced for Kyosho Mini Inferno platforms, intended to mount in the front gearbox area and pair with the vehicle's rear upper arm points. The unit is presented as a single-piece set supplied with mounting screws, aimed at users who need a metal alternative to stock plastic components.

Functionally the part serves two roles: it secures the upper arm mounting area around the front gearbox and provides a stiffer interface that can influence suspension geometry under load. Replacing a soft plastic bulk with an alloy component reduces flex at the arm pivot and can yield more consistent toe and camber behaviour under cornering and braking.

Installation is straightforward for hobbyists familiar with Mini Inferno disassembly. Remove existing upper arm retainers at the front gearbox, transfer any wheel-side linkages and bearings as required, then fit the alloy bulk using the supplied screws. Check alignment and suspension travel before final tightening, and confirm there is no binding on the drive components or steering linkages after installation.