Great deal and easy installation. I have a 2013 Ram 1500 that I use to tow a 6500lb and 800lb 32ft street trailer. I bought these along with the Blue Ox SwayPro weight distribution device to help with swaying and sagging. These works are amazing! Less than 1 inch of sag with them combined with WDH. Took me about 2 hours to install them. I didn't remove the wheels or fenders like the others. Instead I put the back on jacks. could. I then lowered the spare tire and removed it so I had plenty of room under the truck bed. I could sit up straight and leave an empty seat. Then I pinched the airbags and folded them in half. I got all the air out and replaced the air cap to keep them from reinflating. I then used 3 zippers to hold the folded shape of the airbags. I inserted the airbags into the coils through the lowest point. I did it with ease and didn't even need a tool as others have described. Once in place I cut the zip ties and threaded in the slings. I routed the slings through the frame to protect them. I found an existing hole in the frame that sits between the tailgate and the rear bumper to mount the air linkage. Makes the air shaft easily hidden and not prone to accidental breakage. It's a little tight on the fingers, so if you have fat fingers it will be difficult to get to the valve stem. Overall the installation was very easy. Use the zip method and access the coils under the bed by removing the spare tire. Don't waste time removing tires and fender liners. It's a waste of time and more effort than necessary.