[ovekvam]

But remember that the springs and dampers are contributing quite a lot when it comes to reducing body roll, so a 38 percent increase in swaybar stiffness will not be very significant. If you only upgrade one end of the car, you will however notice a change of balance (making front end stiffer will make the car understeer more). Beware that polyurethan bushings can be noisy, making squeaking sounds. They need to be lubricated, as the bar is rotating inside them. The stock rubber bushings are twisting with the bar.

Also notice that adding stiffer swaybars with stock dampers will make the car feel slightly underdamped when driving in bumpy corners.