This is a genuine RC-scale replacement king pin designed for the lower side of the front steering hub carrier on YD-4 family cars. The part uses a socket-head profile and is supplied as a pair, intended as a direct-fit replacement for worn or damaged king pins on compatible YD-4 chassis variants.
Installation and role: the short king pin locates in the lower bore of the steering hub carrier and secures the hub assembly to the steering knuckle, preserving steering geometry and wheel alignment when installed to standard chassis hardware. It is intended for routine maintenance or when tuning requires replacing OEM wear items to restore steering feel.
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