I have a friend helping build a roll cage extension like the one Tusk sells for  Razr.  The question we are having is what is the best tee connector?  Thanks for any help.

I dont trust T connectors.  I would use a connector like this to make it removable and weld them in.  Its a safety component (the roll cage) so dont cheap out on it.  http://www.ebay.com/itm/Yamaha-YXZ-1000R-SXS-UTV-Roll-Cage-Bungs-Connectors-Adapters-Set-1-3-4-1-75-/262671389054?hash=item3d286f517e:g:OO0AAOSwWfFXkVgM&vxp=mtr

Thanks,  that is the way we are going.