What exactly does this front lift/self-leveling kit do? I know what a lift kit is. It basically lifts the truck up a few inches to give it more ground clearance. But what about this front lift/self-leveling thing I keep hearing about. What exactly does it level and why does it focus on the front so much? I mean I assume if you are to raise your truck you just raise it up 4 inches all-around (as an example) and that's that. What would be the reason for a self-leveling kit or whatever. I'm just not familiar with what it's used for.