This Yokomo IB-414KB1A kingpin ball is an RC accessory tailored for A-arms like DRB and DIB that benefit from a slightly elevated ball neck to correct geometry or avoid contact at steep camber. The neck is 1mm taller than standard, giving a subtle but effective change in arm angle without replacing the arm.
The threaded section uses the 3mm ISO specification and mates with aluminum steering blocks designed for that thread. Fit these when the stock ball base touches the arm under extreme camber or when you need to tweak upper or lower arm angles to improve steering response and tyre contact.
Installation is simple: remove the original ball, thread the IB-414KB1A into the steering block or ball mount, then cycle the suspension to confirm full travel clearance. Check for any binding at the ball base and evaluate roll center and camber behavior on a test run before final torque.
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