By converting the factory stamped steel radius arms over to the BDS 4-link design you are able to optimize suspension geometry for better handling characteristics while adding strength and stability. This bolt-on upgrade utilizes high-strength 1/4" steel brackets that allow mounting of HD upper and lower control arms to correct axle positioning while limiting caster change throughout wheel travel. These arms use large greaseable bushings and come finished in a durable textured black powder coat.