The massive tie rod ends thread into the tie rod end body so that they may 1) be replaced without replacing the whole rod end saving cost, 2) the same threaded in tie rod end is used at all 4 points so only one spare would have to be carried, and 3) they may be unscrewed from the rod end bodies and screwed in from the other side if a flipped tie rod was desired. The tie rod tube feature machined-in wrench flats and jam nuts for ease of adjustment. This unit is a direct replacement for the stock parts. No modifications or machining to any part of the vehicle are necessary! NOTES: Flipping the tie rod would require retapering the tie rod end holes from the top side of the knuckle.