ride control. you can increase or decrease the amount of roll you have in your chassis when you increase/decrease the length of your endlinks. i'm pretty sure REDZ has told you this before .not to mention the fact with the way they are made you pivot point is closer to the attaching area. it's just more sound of a design than any stupid bolt submerged in a rubber bushing. i am absolutely loving the suspension setup i have right now with AGX struts, eibach pro kit springs, and these endlinks. i will probably like them more when my H&R sway bars come in.