The lower ball joints are the correct ones that you need for the cast iron control arms despite the wrong part numbers in the description. The steering effort is somewhat reduced and it all installs easily. All the joints are grease able and there are castle nuts on a few of the locations where as factory has zero. I have a xrf kit on my super duty as well and find these to be quality parts.
Everything fit great, no problems
Awesome kit, installed just fine. Have used XRF parts before and expect them to be of similar quality. Shipping was fair (Alaska location) and prompt. Will use American undercar again!