Toyota introduced a new range of accessories aimed at their best selling hybrid, the 2011 Prius. These new elements which are called the Performance Package, were first seen at the 2010 SEMA Show, and they include new front and rear bumper spoilers, sleeker side skirts and new 17 inch wheels wrapped in low profile 215/45R17 tires.
The features mentioned above do not only look sportier, but also reduce the car’s aerodynamic drag coefficient.
Customers who opt in for the 2011 Toyota Prius Plus Performance Package will also have a choice of four exterior colours, (Blizzard Pearl, Classic Silver Metallic, Black and Winter Gray
Metallic) plus the car will benefit from a tuned rear sway bar in combination with a new set of tack tuned lowering springs which lower the car’s center of gravity by 1.1 inches at the front and 1.3 inches at the rear.
The rear sway bar is made from high carbon spring steel and as you can imagine, its role is to improve traction and handling.
The 2011 Toyota Prius Plus Performance Package is available as an add-on option and costs 3,699 USD when fitted on the Prius Two, Thee and Four models, and 2,999 USD for the Prius Five.

Source: Toyota