Oh I don't know, it wasn't my original plan when I bought it, but ended up wanting to put them on to lower it. To each his own I guess. The shop that installed them recommended the adjustable end links because of how much the car was lowered. I tightened the nuts on top of the struts but that doesn't seem to help. I did check the trunk, and I am going to remove the spare tire and see if that does anything, but it sounds like it is coming from the passenger side rear.