Just bought a 2000 4runner 5speed. It has some sort of lift. I don't know how big or if its suspension or body lift. The front shocks say revtek on the top. The shocks are black on the outside and red on the inside. The rears are black with blue air bags in the rear. The rear struts are sensatrac. How can I figure out how big of a lift and if its a body or suspension lift? what are the blue air bags for?