The Kyosho MZW407 stainless king pin ball is a durable spare that improves the vertical movement of the knuckle on MR-03 cars. It is intended to reduce play and maintain consistent handling during runs.
Made from stainless steel with a polished surface, this king pin ball lowers friction at pivot points and stands up to wear. The material choice helps keep steering feel consistent over time.
Engineered for Kyosho Mini-Z MR-03 platforms, MZW407 fits the standard knuckle assembly and installs with common Mini-Z tools. Ideal when replacing worn parts or preparing a race car.
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