They lower the sway bar back to stock geometry. Some people have said it improves handling, others have said it's stopped the shock from rubbing on their sway bars. I don't really have anything to compare them to because I did my lift and refurbished all bushings on my sway bars and added these extended links at the same time. But it just made sense to me to bring the geometry back closer to stock. My truck rides great, but I can't say if these are why.