The factory ones arn't very strong mate. I have just fitted Threedogs (outback ideas) rear and another "rated" (sorry TD) brand to the front. Just have a look at the difference and you will see why. TD's rated rear is fully welded and twice as thick as the spot weld thing that comes on the standard patrol. Front also welded plate not just a hook. Spend the $'s and get them upgraded IMHO.