Sold in pairs (comes with left and right side sway bar end links for the front or rear).
Upgraded sway bars are only as stiff as their end links. Whiteline Sway Bar End Links are much more heavy duty than your OEM ones, and they're designed to make sure your end links are not the weakest link in your suspension. The factory end links are designed to work with the stock sway bar at stock ride heights. They can cause fitment issues when the car is lowered and cause the sway bar to be angled improperly which can cause it to act stiffer or softer than designed. Also the extra load from a stiffer sway bar uses the sway bar end links to transfer the load from one control arm to another. The stiffer the sway bar, the more load that is transferred.
Moreover, stock end links can break, their bushings can collapse, and they can even damage the control arm mounting point in some cases. Whiteline sway bar links fix all these issues. By starting with a stiffer end link body to prevent any breakage even under the hardest race conditions. Using heavy duty steel ball joints or their proprietary synthetic bushing material allows the end link to move as designed without deflecting under heavy loads, which is what can lead to damage to other suspension components. Most applications also utilize a turn buckle center section allowing you to make small adjustments to the end link to account for changes in ride height and to allow you to preload the sway bar if needed. Whiteline sway bar links are the best addition to get the most out of your sway bar, upgraded or OEM.