It will make quite a noticeable difference on the standard suspension setup. I did the lowering springs and Bilsteins first and then did the IPD anti-roll bars and even then noticed quite a reduction in body roll. Of course, the car still rolls when pushed hard in the corners but hey, this is a 3,500 lb. sedan on a non-too sophisticated suspension. It will never out-handle a lighter and more agile car like a 3-series or something. Not knocking Volvos or anything, I love my 850 turbo but I'm just telling it like it is.