Installation was easy! After installing them on my 2016 Ram Ecodiesel, I filled the bags to 20psi, hooked up our 6000# trailer, then towed it to storage. This helped a lot with sagging and swaying of the hitch weight. I installed the valve stem in the fuel filler flap to hide it. The photo shows that I drilled a hole for the valve stem just above the DEF cover (see image). If you don't have eco-diesel, yours will look a little different. It turned out very nice. Highly recommended.