I wanted to find out how one measures the rear sway bar. That is diameter or circumfrance? I recently had my mechanic put on a dealer issued stock sway bar, and it seems small. My handling going into turns seems to have diminished. I am not sure if the recent adjustments on my alignment has changed the handling, if it is the sway bar from the earlier models, or if I am just use to the handling of the bigger sway bar? Thanks.