My civi Caprice didn't come with one, but now that I've got the new Hotchkis RLCA's I've been thinkin' about it. What I've been pondering is this. Since the mounting position for the rear sway is so close to the axle, how much sway or twist can it really be experiencing? After all, the axle is solid, and what twist might happen would seem to be absorbed by the control arm bushings. A sway bar on an independant rear suspension I can see, but will it really make a difference with solid axle rear-end?