We installed one arm at a time, mounting the short spacer on each arm towards the inside of the vehicle and the pinch bolt facing out. This moves the front link pivot points closer together on the frame and helps correct roll-steer geometry. Without letting the bar turn, we adjusted the length by turning the silver hex collar. You will notice the collar and rod end will move equal amounts. Adjust until the rear holes line up and insert the bolt. You can then adjust the collar to take up the slack in the arm length.