I had to use some nuts as spacers when I put the tow hooks on. As it came, the hooks would not bolt to the brackets, they would hit the bumper. As seen in the picture was about as high as I could get them and still clear the bumper with the thick nuts I had on hand.
They look like they are lower than they actually are due to the angle of the picture - the front end of the XJ is up pretty high.
They were kind of a pain to install. All the holes were very close to lining up with the holes in the frame rails, but getting all the holes to line up at the same time took some time and effort.
I could have taken it easy and just trimmed the air dam, but I was in a hurry and didn't really care about the dam so I just cut sections of it out for the hooks.
All in all I am glad to have them, although if I had it to do again I might just buy a front tow hitch. In any case they were a lot cheaper than a bumper.