This kit is a good way to add new polyurethane bushings to your factory control arms without replacing the entire arm. This kit does upper and lower, left and right. These require that you remove your factory rubber bushings but leave their thin outer metal shell in place. Most common way to do this is to heat the rubber and melt it out.
For '95-'04 Tacoma 4x4 and PreRunner. Comes with instructions.