Also almost a week later, maybe 1 day shy, i added the Petty's Garage swaybar set. turns out the rear sways on the Road & track models are already 22mm... however, they feel kinda light. so it may be a 22mm hollow bar. i can say the petty's offerings were stout and had some weight to em. So they are def an upgrade by far. currently have em set on soft as instructions state. but once i upgrade the links to something a bit more stout, i'll move em to middle, and adjust front and rear from there.