The factory rubber bushings tend to wear, and can cause unpredictable movement and behavior of the sway bar, even more so when an upgraded thicker sway bar is installed. Having all this flexibility can reduce the performance from the sway bar, making your choice to upgrade stiffness, less of an upgrade with all this movement. The GKTECH Front swaybar spherical end links are a direct replacement of the OEM end link, but have been re-engineered with PTFE Lined spherical bearings, which also have a common (YPB6T) bearing for serviceability. The main body being machined from 6061 Aluminium, thus providing zero flex between the sway bar and the lower control arm, giving the driver a more direct, predictable feel. Links fit both aftermarket and factory sway bars. Vehicle Compatibility: - Nissan S13 240sx - Nissan S13 Silvia - Nissan S14 240sx - Nissan S14 Silvia - Nissan S15 Silvia SOLD AS A PAIR