Very easy to install on my Tundra with Firestone bags. Remove the screw that secures the bags to the lower mounting bracket, then use a jack under the hitch to raise the rear end just enough to remove the bags from the axle, leaving enough room to move around to install the supports. Slacken slightly to check alignment before tightening - raise and lower the back end a few times to be sure. They're made of high density plastic so they won't rust or corrode and hopefully won't break. At least my axle now has full articulation when needed - in my application they added about 1/2 inch of lift at the rear. The next step in updating my rear end is longer stays and new shock absorbers.