last year i installed 4 bilstiens (normal, not hd's). what i replaces was orig bilstiens in the front and gas-a-just in the back. the ride improvement was good and i love the way it handles on normal roads and bumps. but taking hard turns (like exit ramps at moderate speed) and the car really dips. i don't think that is from the shocks. that may be springs and anti-sway bar/bushings. but i think if i tightened up the ride so that it doesn't dip in hard cornering then the other aspects of the ride would become less comfortable.