This aluminium rear knuckle arm holder is an aftermarket replacement designed for Kyosho Mini-Z AWD micro touring cars and MR-03 AWD chassis, supplied as model MZA031R/-0.2. It is sold as a single replacement piece intended for rear-end setup work where precise toe changes influence turn-in balance and corner exit behaviour.
Functionally the part gives a fixed -0.2mm toe-out versus standard geometry. That small rear toe offset alters transient handling and can change rear bite and yaw response when refining a Mini-Z AWD setup for tighter track lines. The aluminium alloy construction provides a firmer mounting location than stock plastic, helping keep alignment stable under load.
Installation notes: this replaces the factory rear knuckle arm holder on compatible Mini-Z AWD MR-03 layouts. Standard hex drivers are all that is needed; after fitting, check bearing fit and fastener torque, then confirm wheel alignment on a setup board to ensure the intended toe is achieved.
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