there for the front. i thought the bushing might be bad but i actually thoroughly looked them over today and the bushings are still good, they're just stiff but someone told me there supposed to be that way. I don't really have any experience with poly joints.
but yea these things should make your zj ride slightly smoother with the better joints and are definitely way beefier than the stock flimsy control arms. these arms are actually perfect for a smaller lift, my problem with them is i'm going up 6 inches...so not so good. i need adjustables(actually just ordered them friday)