What is a sway bar and what does it do?

The sway bar, also often referred to as an anti-roll bar is a suspension component that connects both sides of the suspension together giving resistance to either side from working independently from one another. This basically is always trying to keep the wheels level with the frame giving you stability (anti-roll) when cornering. While the anti-roll bar is great for cornering, it is a hinderance when traversing obstacles or rock climbing or uneven terrain.