I bought 2 of these with a Moog K200840 and they took care of the horrible play in the back of my 99 DeVille. Now the rear of the car feels more manageable and the noise from the old bushings is gone. In addition, the rear suspension could now be tuned to wear the tires properly. They were easy to assemble with a ball joint press, even as the car survived 19 Wisconsin winters. They have about 2000 miles on the odometer at the time of this review and I will let you know if they fail unexpectedly.