Those with a keen eye have asked about the brackets shown included with the ND Progress sway bar combo.

The ND's front sway bar bracket is sufficiently strong to handle the additional loads of the stiffer Progress sway bar. However, the ND's rear sway bar mounts are a different story. Much like the NA/NB's front sway bar mounts which hovered over the frame rail and so often ripped when you put stiffer sway bars on the car, the ND's rear sway bar bracket hovers off the rear subframe with a thin steel mount that is unsupported on one side. 

Included with the Progress rear sway bar is an additional bracket that boxes in this area and reinforces that weak design.

Here are two photos of the factory rear sway bar mount with the sway bar dropped out of the way for a better view. Notice that the mount is entirely unsupported on the outer side: