I'd go with the BAT bar. Thats what I have and I love it. It tightened up the rearend, but its not too stiff. I've heard of people loosing the rear with the Aussie bar since its so stiff...if you ask me...that isn't so good. Over all I think the BAT bar is the best. If you are going to race the car or auto x it, then the aussie bar is probably your best bet.
