To install a sway bar, lift the car up to around 2 to 3 inches above the ground with a jack. Make sure to place the jack right under the suspension arm to relieve the tension on the sway bar link. Remove the endlink bolts and bushings attached to the suspension arms, then remove the sway bar mounts that secure the sway bar to the subframe.
If the nuts on the mounts are difficult to loosen, apply rust penetrant, and allow it to soak for a few minutes before trying to loosen the nuts again. Once the endlink bolts, bushings and mounts are removed, you may detach the sway bar from the vehicle underside.
Slide the new sway bar into place, then re-tighten the mounting brackets and endlink bolts. For best results, replace the bushings and mounts along with the sway bar. Grease the bushings as well.
In some vehicles, such as the Audi A4, the front wheels must first be removed to access the sway bar. In others, such as the Honda Civic, you first need to drop the exhaust and shift linkage before you can remove the sway bar. Despite these additional steps, the sway bar removal and installation process is similar for all vehicles.