This is just a survey of what people would replace their OEM shocks with for a 2013 RAM Cummins 3500 Dually. I need to replace mine now that the truck has 70K on them. Thanks
Look up the appropriate shock for your particular application. I bought ours from shockwarehouse.com, which site also includes an application wizard. I don't necessarily think they have the best prices; shop around!
I was going to have them mounted, but found that I was able to do the job myself without significant issue.