Diameter of the sway bar?

[04S-TracJon]

I was searching the net for bushing for the sway bar and got different diameter options. Just want to make sure I get the right parts. Anybody know what size I should get? Is there a sway bar "upgrade"?

 

[swshawaii]

Stock 2001-05 ST Sway bar diameters

http://www.mysporttrac.com/shared/msgboard9e.asp?BOARDNAME=MSG&VIEW=1334643

 

[swshawaii]

IMO, a larger REAR sway bar is the best handling upgrade for a street driven ST after tires and shocks. Simply incredible.

http://www.zabteck.com/swaybar.htm

http://www.explorerexpress.com/-c-24_54.html

http://www.hellwigproducts.com/products/sway-control/truck-suv-sway-bars/ (Rear #7648 )