I want my mini to have 0 body roll. What are the best sway braces with light weight in mind? Please link to buy!

 

0 body roll could be achieved by replacing the shocks with steel beams.

As for your question, your best bet would be a hollow swaybar. I like my H Sport 19mm rear swaybar with ajustable holes, but it's a full bar, not hollow.

 

19 MM adjustable here with KONI FSD struts. Only roll I've got is forward or back and the occasional cinnamon with coffee. I do like Da_Ghost's suggestion, 1 inch re-bar would be just about right.

 

Don't forget the body stiffening mods

Best thing I've done. No more body twist.
In combination with struts and rear sway bar I think you'll get where you want to be.
You'll just need some tires that can handle it.

 

There is a vendor directory near the top of the page.

 

A rear sway bar is a good bang for your buck mod and will help with that. Whiteline is my go to choice. I run all their products and have nothing but great reviews about them. The sway bar is also adjustable to fit your needs.

http://www.pelicanparts.com/catalog/..._pg2.htm#item5