To make the problem even worse, us spec cars have smaller sway bar than similar models sold elsewhere in the world. The key to making your car turn better comes from replacement of the rear sway bar By increasing the diameter and leverage, more cornering force is applied to the outside wheels. Thus forcing the car to "turn-in" better. Additionally reducing sway also increases the contact patch of the rear tires. The Alta Performance rear sway bar goes one step further than simply making the bar bigger. Although size is increased , Alta has added the flexibility of changing the bars leverage with 2 different end link attachment points. This allows the end user to custom tailor the way his or her car handles. The Alta Performance rear sway bar is available in both a 19mm and a 22mm dia. bar. The street enthusiast will enjoy a 19mm upgrade to improve cornering in ordinary driving conditions. Race and hard line drivers will enjoy the 22mm sway bar option as an aggressive, forceful sway bar for excellent cornering and turn in during hard cornering.