I bought these and a pair of shock absorbers to restore the rear of my 2006 Liberty to its original condition. They work great. The ride in the rear is much smoother and the rear no longer sags. They are stronger than factory springs and very easy to fit. Jacked up the car and put it on jackstands. I removed the wheel and shock absorber. With one hand he pressed on the brake disc, with the other he removed the spring. I then repeated the process with new parts and tightened everything to spec. It only took 30-45 minutes for each side. It's that easy.