So tell us what this is and what it is supposed to do. Is this meant to be installed on the front or rear suspension? A few decades ago (when I was younger) I installed an add-on sway bar on the rear suspension of the car I then owned. It improved the steering and handling and stiffened the suspension somewhat. However, the Aveo is the cheapest car imaginable with a very unsophisticated suspension. It rides like a truck. A Porsche it ain't, and adding a bar isn't going to make it so. I have read that the control arm bushings tend to make annoying noises and fail prematurely. Perhaps solving that deficiency would be of greater interest?