I have never ran them, but they are a twin-tube design. mono-tube shocks last way longer, cooler, and smoother. Mono-tube and twin-tube, is the way the internals operate, and have nothing to do with number of shocks on a vehicle. Mono-tube shocks start at $80. 00 each and go up into the many hundreds from there. Adjustable mono-tube shocks cost a little. I think I payed $90. 00 for Edelbrock shocks. They are internally self-adjusting depending on the terrain. Bilsteins are also an excellent shocks. These trucks are so heavy, I feel that, if budget allows, any name brand mono-tube shock would serve you better. Oh yeah, did I mention that I have had these Edelbrocks on since 2001, and have over 150,000 mile of hard use on them. They pay off in the long run. Hope this helps.