Just installed these yesterday. Don't think the previous owner of my JKU HR, ever had the doors off. Needed the jack method to get them off and a lot of pounding to get the old liners removed. So much that I needed to realign 3 of the 4 doors. (
With the new liners, there is zero resistance in the doors. Night and day! Wish I would have swapped these out a while ago. I can now pickup the doors like they were not even in a hinge. Incredible! Jeep needs to make these a factory item.
Now I just need to work on no longer slamming the doors to get them to close and holding on to them when opening in the wind.