Min 60mm Lift Req For Fitment. If you have a lifted 05-on Hilux and during articulation you hear a clunk during full articulation, it might be the Front Upper Control Arm making contact with the Coil. Roadsafe have a 25mm extended Upper Ball Joint, that fits to the Upper Control Arm, to space the arm far enough to avoid the factory upper arm and hitting the coil on full droop. As an added bonus, it also provides an extra inch of downward travel, plus improves caster. RB011K Boot. Upper Ball Joint extended 25mm compatible with Toyota Hilux GUN 05-15 KUN & 15-On