Now it was time to get to the rear. The four-link makes for some easy sensor mounting, but head engineer Art Langtry explained, "If your car has suspension, our sensors can be mounted. We've installed on everything from leaf-spring setups to GM A-bodies." They decided to mount the sensor to the lower link and to the inside of the frame (the sensor sleeve was loosened and rotated 180 degrees to make this possible). Similar to the front, they needed to measure to find a point on the moving arm that traveled 3 1/4 inches. This is the measurement with the air out of the bags and the rearend sitting on the bumpstops. The measurement is 9 3/4 inches.