Let's think about this. First, the front shock towers are really strut towers. Struts, by definition, not only act as shocks (up and down), but also are a side load bearing structure, meaning they are one of the pivot points of the suspension. This loading of the strut can move the strut towers (few mm) relative to each other and therefore a strut bar reduces this unwanted motion. On out ti's, and most other cars, the rear shocks only act as shocks as the pivot points of the rear suspension are only on the suspension arms. No or very little side load force is transmitted to the rear shock towers. In fact, you could remove the rear shock and drive the car. The rear suspension would work, although very poorly without the shock. You cannot remove the from shock (strut) and drive the car. It is one of the load bearing pivot points. So it's safe to say that a rear shock tower does little to improve performance. |