Good question. The clunk was coming from the sway bar rubbing against the subframe....so when I had the car up on the lift, I replaced the BAT bushings, and tried to square up the brackets a little as well. On the lift, the bar still looked like it was against the sub-frame. Also, I was super anal and actually "pre-loaded" the sway bar as well...I did this because when the car is up on the lift, the control arms hang down so tightening the bar to the endlinks like this could put more stress on the sway bar, pulling it down. Anyway, the clunk is gone....but last time I greased the bushings the clunk went away but came back in about 3 miles...but I've driven about 30 miles so far and its still good so my fingers are crossed!