22mm Rear Adjustable Sway Bar Fits 04-07 Subaru STI Agency PowerThe Subaru STI is already a great handling and performing car. The AWD allows you to push the limits of the car on the street and track. Depending on your driving style, there are many improvements that can be made to the STI to give you better handling characteristics. Agency Power wanted to take the suspension capabilities to the next level by developing this Rear Sway Bar kit for the 2004 and up Subaru STI. The AP bar replaces your factory 17mm bar