The Yokomo B8-414BA 4.8mm king pin ball is built to replace worn front suspension components on BD8 2018 cars. It anchors the knuckle in the hub carrier to keep steering consistent and predictable during racing or practice. The ball diameter is 4.8mm for a snug hub carrier fit.
You get two king pin balls plus collars in this kit, making a quick front-end refresh easy. These parts match the MRTC-BD818 and MRTC-BD818A chassis versions that use BD8 2018 hardware. Fit them as part of scheduled maintenance or when you notice slop in the steering assembly.
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