The STi Rear Lateral Link set replaces your factory rear lateral links. The STi lateral links have an improved design that makes them more resistant to bending under the extreme forces applied to them during cornering. The greatest improvement in them over the factory links however is the bushings they replace. The factory bushings are made of a very soft rubber that allows for a lot of play under stress. The STi lateral links replace those soft rubber bushings with a stiff, low compliance pillow ball joint. This allows for stiffer and more predictable cornering characteristics. And best of all, it is another JDM STi part to show off on your car! This lateral link set is complimented very well by a set of STi rear trailing arms.