This aluminium rear knuckle arm holder is an aftermarket replacement for Kyosho Mini-Z AWD micro touring models and MR-03 AWD chassis, catalogued as MZA031R/-0.2. It is intended as a single-piece swap for hobbyists tuning rear toe to refine corner entry and exit behaviour.
The item sets a fixed -0.2mm rear toe-out versus the standard part. That modest offset affects transient handling and rear grip, enabling subtle tuning of yaw and rotation for different track conditions. The alloy build is stiffer than factory plastic mounts, helping hold alignment when the car is under lateral or drive loads.
Installation guidance: fits in the factory location of the rear knuckle arm holder on compatible MR-03 AWD variants. Use common hex drivers for the changeover, inspect bearings and threads during fitment, and recheck wheel alignment on a setup board to confirm the expected toe setting.
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