These KPI King Pin Sleeves are precision-engineered components designed for the Kyosho Inferno MP10 series 1/8 scale competition buggies. Crafted from a durable, low-friction composite plastic, they ensure ultra-smooth articulation of the king pins within the steering knuckles, critical for maintaining optimal suspension geometry and precise steering response. Replacing worn sleeves with this set of four helps eliminate unwanted play, restores factory-spec handling characteristics, and significantly contributes to the longevity and consistent performance of your high-performance racing machine on various track conditions.