It took a few tries to get the air lines properly attached to the airbags themselves to fix. I had to jack the truck up in the middle of the hotel lot because they kept losing air for the first 250 miles. The instructions state not to overtighten these connectors. Well, if you let them loose, they lick. Once properly tightened they hold air as they should. The union nuts that came with the brackets were very difficult to loosen. One screw was broken, but it's easy to replace by driving to a hardware store. DO NOT use an impact wrench for installation! Manually this takes longer, but does not destroy the bolt. They are good for taking up the slack in the back of a half ton Tundra when towing a heavy trailer. And they can be loosened to dampen the ride when not towing. All in all I would recommend.
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