Firestone 2370 Ride-Rite Suspension Self-Leveling Unit.

4in. Spring Spacer Leaf. Install Ride-Rite air springs on a lifted vehicle with these lift spacers. Spacers attach between the bottom of the lower bracket and the bottom of the spring on vehicles with a 2 in. lift. Kit fits air springs that mount on axle or leaf stack. Allow air springs to be installed on vehicles with 2 in. lift. Distance between upper and lower brackets must be between 7.5 - 8.5 in. Spacer must be same size as lift kit rise. Include 2 lift spacers and all hardware necessary for installation. Lift spacer fits axle- and leaf-mounted air springs.