Our performance lower arms are designed to replace the stock length lowers and offer the option to keep the stock rubber bump stop or upgrade to a FOX or King bump stop for increased bottoming resistance. These arms are CAD/CAM engineered for maximum wheel travel and correct shock motion ratio geometry. They are considerably stronger than the stock arms, with internal gusseting and pivots on FK 1" uniballs at the frame for zero binding and consistent geometry. The uniball spacers have a larger diameter for better clamping force and to prevent ovaling out over time. We replace the lower ball-joint with an FK 1.00" uniball at the spindle for maximum strength and articulation. No modification to the spindle taper is necessary as we use machined heat-treated stainless-steel mis-alignment spacers. The arms are made with high-quality materials, CAD designed, laser cut, CNC formed, MIG welded, and powder coated. They are compatible with King 3.0 and FOX 2.5 DSC coilovers and are the strongest stock length aftermarket arms available.