I don't have many miles on them but they are working well so far. I installed them on my 2013 rzr 4 800. Removing the old bushings took some work. I have found that using a bar to tighten the garage door springs and then placing that bar between two old bushings on the inside edge while tapping with a hammer makes it easier to pull the old bushings out. This method didn't work for the lower back and arms. To do this I had to use a flathead screwdriver and a vise to grab the edge of the plastic bushing and pry it out. I believe all the gun bolts were 15mm. I used Lucus Marine Lube. It had a high temperature rating and was great for the water. People use it for boat trailer storage all the time.