Kyosho Inferno MP7.5 Alloy Front Upper Arm Bulk for Gearbox (2deg Caster, +2deg Toe-in) MP7509A by GPM  [MP7509A]

Front gearbox bulk details

This is a replacement upper arm bulk made to suit the Kyosho Inferno MP7.5 front gearbox. The component locates the upper arm pivot and fixes a 2deg caster with a +2deg toe-in, offering a direct-fit solution for MP7.5 suspension geometry.

Fitting is straightforward using the gearbox and upper arm tower mounting points on the MP7.5 chassis. Use the original hex screws with correct thread engagement, do not over-torque to prevent stress on surrounding plastic parts, and check the front alignment after tightening to verify caster and toe values.

As a tuning aid this bulk provides a reliable reference point when altering arm lengths, shock mounts, or roll centre. Install it when you need stable, repeatable caster and toe settings or when replacing a damaged OEM bulk on MP7.5 cars.