This is important because it helps keep the car grounded through a turn. If the center of gravity is too high and centripetal force is too great, the car will flip or at least get tire skip. There are other things that could be done to further improve the suspension of a lowered vehicle. This will help to eliminate body roll which, in a lowered car, may send the body of the car diving into the ground through a turn or at least rub the tires on the top of the wheel well. Either way, it is not a desired result.
Consequences There are a few consequences that go along with lowering a vehicle.
Most have been mentioned already, but I will recap. First of all, no matter what you do to improve the suspension, if you lower your car, you will have to avoid going fast over large bumps such as speed bumps and railroad tracks. If you want to show off your masculinity by driving fast over bumps or up onto curbs or through rough terrain, get a truck. You must keep your eyes open for road hazards. Second, lowering your car will change the angle that the wheels are positioned at.