Inferno MP Series IF103B Replacement Diff Case by Kyosho  [KY-IF103B]

Diff housing for service and setup

The Kyosho IF103B differential case is manufactured as a replacement housing for Inferno MP Series NEO 3.0 & 4.0. It forms the structural enclosure for the diff gears and bearings and is used whenever the drivetrain is being serviced or reconfigured.

This component is positioned as a direct spare rather than a performance hop-up; emphasis is on correct fit and workshop utility. It is designed to line up with the original mounting points and internal dimensions so that standard differential internals fit back in without modification.

Installation notes: remove the differential from its gearbox or rear pod, mark gear positions and shim order, move bearings and gearsets into the replacement case, then check that bearings spin freely and gears mesh properly before final assembly. The case is ideal for routine maintenance, diagnostics, and when swapping oil viscosities or diff settings.

Tuning role: fitting a new IF103B supports consistent diff shim stacks and fluid swaps, which directly influence traction and handling on different track surfaces. Use this case to recover correct chassis geometry after wear or to manage multiple tuning setups efficiently.