The SuperSteer SS110 rear sway bar is heat treated, offering a stronger alternative to the traditional sway bar upgrade. When heat is applied during manufacturing, the steel hardens and becomes stronger. At 1 1/2" diameter, it is larger than the stock sway bar. Traditionally, for every 1/8" sway bar diameter size, you gain 30% increase in strength. Heat treated sway bars provide approximately 60% increase for every 1/8". A huge improvement for such a small increase. The sway bar will help eliminate sway and body roll in your RV. Our heat treated sway bars are thicker and stronger than the factory alternative, reducing the risk of breaking. Our kits come with polyurethane bushings.