For the last three years we have been testing our D2 bushings in Moab Utah on rental Jeeps, and from coast to coast on trails like the Rubicon, Rausch Creek and other trails along the way. The toughest testing out there. The results? A bushing that absorbs up some of the toughest trails out there, and a great ride on the road. This high articulation bushing is maintenance free and rebuildable. Simply put they work!!!