These nickle-plated chromoly tie-rod extensions are for the person putting together their own Titan Swap on a Frontier or Xterra. These thread into the stock outer tie-rod end and bottom with the new jam nut, the inner tie-rod adjusts like stock. Price is for the pair. The issue with using a Titan inner and outer tie rod is that the steering arm on the Frontier/Xterra spindle is farther outward and proper alignement only allows about 1/2" of thread engagement....really not ideal at all. With these extensions, there is over 1" of thread engaged on both the inner and outer tie rods....these also allow for even more adjustmtent if needed.