Designed for MP9 chassis, the Kyosho IF420B knuckle arm collars help lock in steering precision so wheel inputs remain faithful to driver commands. They are a compact upgrade for anyone chasing consistent handling.
The collars fit the MP9 knuckle assemblies and provide a snug interface that reduces end play. They suit competitive drivers and hobbyists who demand steady steering under varied track conditions.
Before fitting the Kyosho IF420B collars, clean the knuckle and shaft areas and ensure parts seat correctly. Tighten to a secure feel without overtightening, and inspect regularly to catch wear early.
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