Here's a tip that I learned long time ago with these style of end link bushings: When the bar gets attached, to the end links, it may not be equal in its attachment to the end links each side (driver/passenger).. so that will induce a pre-load to one side. You want it to be as eqaul as possible, as the car will be loaded and driven (or raced/autocrossed/road raced, as I have my car primarily setup to do). you can easily add an extra bushing shim, or two or as needed, to the end link bushing attachments/bar to make the clamp-down effectively equal per side (drvr/passenger).... It's part of setting up the car's handling details that make a difference overall. In other words, you don't want one side of the sway bar performing more strongly than the other side. Another option is to use adjustable heim-joint end links to resolve/eliminate this matter.