This aluminium rear knuckle arm holder is an aftermarket upgrade for Kyosho Mini-Z AWD micro touring cars and MR-03 AWD variants, listed under model MZA031R/-0.2. It is a single-piece replacement aimed at fine rear axle tuning where small toe adjustments affect vehicle balance and corner behaviour.
The component imposes a fixed -0.2mm toe-out relative to stock geometry. That minor change to rear toe changes how the car initiates and recovers from turns, influencing rear grip and yaw during cornering. Made from aluminium alloy, the holder gives a firmer anchor point than stock plastic parts, reducing flex under load and helping preserve alignment.
Fitting advice: the holder fits in place of the original rear knuckle arm mount on compatible MR-03 AWD chassis. Use basic workshop tools, check bearing seating and screw tightness after assembly, and confirm wheel alignment on a setup board to verify the intended toe setting.
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