Load leveling capacity by reducing bottoming out. Reduces suspension fatigue and tire wear. Provides a better overall and steering control. FOR FOLLOWING VEHICLES (FOR REAR ONLY). 2001 Excursion air bags. 2002 Excursion air bags. 2003 Excursion air bags. 2004 Excursion air bags. 2005 Excursion air bags. 2006 Excursion air bags. 00 Excursion air bags. 01 Excursion air bags. 02 Excursion air bags. 03 Excursion air bags. 04 Excursion air bags. 05 Excursion air bags. 06 Excursion air bags.