Yokomo Y4-8BA 13.5mm Shock cap ball (4pcs) for YD-2/YD-4 橫崛  [Y4-8BA]

YD-4 standard shock limitation ball. Whenever starting the damper, it is an aluminum component which connected to the top the surprise, besides the ball won't be crushed whether or not the damper installation nut is tightened extremely, which means that your surprise wont get stiffly.