Here you see the Hellwig Products (top), stock (center), and factory C5 Z06 (bottom) sway bars compared. While the Z06 bar is almost the same diameter as the Hellwig Products bar, it is also a bit longer and doesn’t have the multiple mounting holes like the Hellwig Products bar, so it is non adjustable. Hellwig Products’ Ben Knaus explains further “The most obvious advantage is the larger diameter and therefore stiffer rate than the factory bars, to lessen body roll and improve cornering performance. Besides that, Hellwig Products’ bars are adjustable, thanks to because multiple mounting holes in the end of the sway bar. By changing which hole you bolt the end link to, it lengthens or shortens the sway bar’s arms, therefore the lever arm and the rate of the bar. The longer the arm, the softer the bar acts. This is very popular, since different drivers like to set up their cars differently, and some will even use this feature to change the sway bar rates between the setting for daily driving, track driving, or even between different tracks. Also, there are other benefits such as high quality powdercoat, and heavy duty polyurethane bushings.”