I looked at all the options for upgrading the suspension on my 2013 1500 Ram Laramie. Considered the Timbrens, and the other jounce replacements, but as others have said, wanted something adjustable.
Settled on the Air Lift 5000's. I bought mine from E-bay for 248.01 shipped free to my door. The kit that I bought requires removing the jounce bumper, and then removing the jounce bumper mount. Well decided to use this model as I don't plan on going back to jounce bumpers, and it seems to me that it gives the air bags greater area to operate.
They are a little more complicated to install, but hey this old, (almost 76 year old retired Marine), did the installation in my driveway, also installed my 5th wheel hitch myself, but thats another story
Anyhow, you have to raise the truck enough to allow the stock suspension to swing free to be able to remove the springs. Make sure you have a paint marker on hand and dab the spring and the lower spring mount before you remove them so you can reinstall them correctly, important! Also prior to removing the spring, you must remove the lower shock mount bolt to allow enough suspension travel to release the stock spring. At some point you may have to remove the wheel/tire for additional work area. And you have to have a good cut off grinder available to cut the welds off the old jounce bumper mount and grind the welds down flat. IMPORTANT.
As the kit is sent to you, it is set up to be independly adjustable on each side, so uneven loads could be adjusted. Well I determined that I didn't need that, so went to my local NAPA and bought a T, quick connect and that allows only one air line to adjust both bags the same. The kit has really good instructions but some things are learned by experience.
The plastic 1/4 inch air lines with a little modification will ensure that they don't leak. Use a heat gun, or your wife's hair dryer and heat the ends of the line, careful doesn't require a lot, experiment on a scrap piece first. Then get a blunt end drift and push it into the heated line, allow it to cool, when you remove the drift, you should feel a little shoulder on the line, when you insert it into the quick connect fitting now it won't leak, at least that's the way it worked for me.
I'm gonna try and post some pictures of the project, so here goes. Sorry about the ones that came out upside down, guess that's what happens when you are laying on your back