Pedders sway bars are made of solid stock. We choose to use solid stock for consistency in production. In a hollow bar, the thickness of the wall determines the strength of the tube.

Anything less than a perfect bend reduces the strength of a hollow bar more than the same imperfection would in a solid bar. Solid stock is far more forgiving of less than perfect bends consistently delivering superior strength. The weight savings of a hollow bar becomes less and less significant as you study the application of material. First the weight is not unsprung so five or ten pounds does not radically alter the function of the suspension. It is not spinning mass as would be a brake rotor or tire and wheel so the weight doesn't not radically alter the function of the brakes. It is weight placed very low in the vehicle creating a very slight shift in vertical CG, but that too is of little significance. In the end, a 27mm solid bar is stronger than a 27mm hollow bar with a slight weight disadvantage. (There is much confusion on the subject of solid vs hollow bars. One of the best discussions from independent sources is available on the BMW forum.
BMW Thread. The second post by Matt M. has the most comprehensive information.) It is our view that in volume production for a street enthusiast vehicle a solid sway bar will be the most consistent solution. Pedders provides the informed and educated Camaro owner with three sway bar solutions to match your driving skills and style that not only include the standard mounting hardware, but also include adjustable double ball joint endlinks to deliver the best possible driving experience.
With the foundational components are in place you will find Pedders Camaro adjustable bars to be a significant improvement to your OEM bars. The center adjustment position delivers 27mm front bar performance. Each position you move toward the firmer setting, toward the sway bar mounting D bush will increase the sway bar rate 1mm. The same is true moving away from the D bush toward the softest setting. With this range of adjustment built into both the front and rear bars and Pedders range of bars you should be able to adjust them to match your specific Camaro setup requirements. Keep in mind, that buying sway bars BEFORE you have installed EP1200 or 1201 Sub-Frame Inserts or Bushes along with at least the
EP6578 Radius Bush Inserts is a mistake. You'll never enjoy the full benefit of the bars until you do. Many who follow this advice will find they don't need a sway bar upgrade. The weakest elements in the Camaro are the Sub-Frame and radius Bushes -- not sway bars. Build a solid foundation using Pedders bushes, dampers and coils and then use sway bars as the final tuning element.