GPM MP7509B Kyosho Inferno MP7.5 Front Upper Arm Bulk Alloy  [MP7509B]

Front upper arm bulk in alloy for MP7.5

This RC-scale alloy upper arm bulk is designed for use with the Kyosho Inferno MP7.5 front gear box. The part is an option hop-up that sets the front suspension geometry to caster 2deg and toe-in +5deg as noted in the title. It is supplied as 1pcs and serves as a direct replacement for the front gearbox mounting area on the MP7.5 platform.

In service the component acts as a structural substitute for the original plastic bulk and as a fixed-geometry element that defines the specified caster and toe-in at the front. When fitting, inspect the existing front gearbox mounting points and reuse OEM hardware where possible; the part is made to align with the MP7.5 front gearbox without modifying other chassis parts.

Use this bulk as the baseline for suspension setup and roll centre tuning; since caster and toe-in are established by the bulk, further changes to steering feel should be made using linkages or toe/camber blocks to fine tune handling for practice or track use.