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Next, add the upper control arms, making sure to screw both rod ends in all the way. Use the hex to extend the rod ends until they have equal thread engagement. One end has a LH thread and the other RH, so they can be adjusted without removing the arms. To avoid confusion later, install them so they both adjust the same direction by turning the hex the same direction, and don’t forget the rod-end spacers on both ends of the arms.