Board Thread:News and Announcements/@comment-92.16.70.217-20130102211616/@comment-294719-20130210034743

Every time you take a corner, the car's frame (or chassis) flexes a little, and this flexing weakens it over time. "Restore body rigidity" brings the frame back to the way it was when it was new, though the car has to be quite well-used for you to really notice the difference.