HOW TO: Whiteline Rear Sway Bar and End Links Installation - Subaru WRX 2008-2014
A rear sway bar and end link combination is usually a great upgrade for anyone desiring a better handling car by just upgrading one simple thing. Most non-sports car models (a WRX is not a sports car) don't have stiff enough components to prevent the excessive body roll they experience. Keeping the body on a flatter plane as it moves through the corner makes better use of the tires and keeps the car more consistent and controllable.