xflstl
New member
I know some people swear by them, but they are far from necessary. Also you should know that you will not be able to run am ARB locker with those sleeves.
If you want to install a sleeve and still be able to upgrade to 35 spline shafts in the future use these
http://www.justdifferentials.com/index.php?main_page=product_info&products_id=4166
However as already stated, sleeves only help strengthen your tube's, however they can still be bent.