There is no bush on the end they have simply weded a tube at 90 degrees that the bolt goes inside to close off the brace tube. Have a look on google images most of omp ones are finished like that and there is a few close ups. There are also some ( that i prefer ) with a left and right rose joint on the end so you bolt it in place then twist the brace to apply tension to the shell then lock off the rose joint nuts.