I installed these 4.5 inch coils on my 97 XJ last year and was very happy with them! The ride quality is excellent, I've ridden them about 10,000 times with no issues, including many off-road rides. I highly recommend Rubicon Express products. I also have Rubicon Express back sheets. I chose 3.5 inches in the rear and it fits perfectly, no sagging or squatting under load.