I have an 8 inch lift on my XJ with the extreme duty trac bar from RE but it still isn't long enough is there any longer trac bars out there?

Make one, it wouldn't be hard:flipoff2: :flipoff2:

what norcalXJ said, or add a bracket like the TJ kits come with to locate it higher off the axle if its the rear, If its the front make a drop bracket off the frame mount. But a longer one would be easy to make or cheap to have made(think beer drinkin, welding buddy, shouldn't cost more than a six pack):D

if you ain't got stuff you do it yourself,
they are pletty of welding shops that could cut and lengthen yours.....just pic a good spot:) probably up near the top (adjustable end) would be good.