-Stiff Shocks. Which lead to a nice smooth ride.
-High quality material
-Perform great on road and off.
-Stiff shocks. Some prefer the softer shocks over the stiff.
-The upper shock mount has to be held with either a 1/4" wrench (which i did not know) or vice grips to the piston. This is a con because the upper shock mount area is a very tight area, and to have to fit 2 wrenches, is rather difficult.
5160- (have not had enough time to fully test)
-A little bit softer (but not by much) than the 5100s. Which give a VERY nice on road smoothness.
-Reservoir lets shock flow smoothly.
-Upper front shock mounts only need 1 wrench to tighten.
-Wish the reservoir to shock cable was an inch longer. So the reservoirs could mount to the cross member more easily (most common mounting place on JKs)