These 1" uniball inserts replace the crappy vucanized bushing assembly on first and second gen Raptors. We use a domestic FK built 1" teflon-lined uniball and a billet press-in housing for years of bind-free and noise-free use as well as stainless spacers. Installation is pretty easy....you press the old bushings out using a press or puller. Then press the new bearing assembly in. If you have a small torch or Bernzomatic you can apply a little heat to the housing and the new parts will basically drop in. If you even need new bearings, they can easily be serviced and cost about $50/set. Best part is that because the very large housing, these bearings are bigger than any used in even the largest 4+" trophy truck shocks (typically 3/4" bearing is the largest used). These are sold in pairs and we typically have these ready to ship but it may take a few days to get them out the door.