The Kyosho MZW412B SP Long King Pin Ball Set brings a targeted steering upgrade to the Mini-Z MR-03 range, improving front-end precision for racers and club drivers who want crisper turn-in. It replaces the standard king pin balls to reduce slop and sharpen steering response.
This kit is made specifically for the Kyosho Mini-Z MR-03 lineup and fits models using the standard MR-03 steering assembly. Expect smoother arc tracking and more consistent handling when pushing through quick direction changes.
Installation of the MZW412B set is straightforward and requires common RC tools only. Clean the steering area before fitting, check for correct seating, and perform a brief test run to confirm alignment. Periodic inspection keeps the parts working at peak performance.
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