|If you want to add your bump stop to the shaft. Just drop the top hat on the shaft, add the urethane bushing, steel washers and nut. The nut should be tighten to the self locking part but do not over tighten the nut. On some shocks we have had to cut down the thickness of bushing to make it fit on the threaded shaft.
On the 99 and up Miata’s you will have to grind out the front upper hole.