Extra Info:

Coil-Rite? Front Air Helper Spring Kit (4160) by Firestone?. Mount inside an existing open coil spring suspension. These air springs provide adjustable spring rates far superior to the standard coil spring. The durable polyurethane air springs will support 500-1,000 lbs per set.
Features:
Control the air pressure in the air helper springs for varying loads and road conditions
Spring performance can be altered as easily as inflating a tire
Made of durable, elastic polyurethane
Support 500-1000 lbs. per set (not to exceed vehicle?s GVWR)
Designed to work in temperatures between -40 F (-40 C) and 180 F (82 C)
Average time of installation: 1 Hour
Manufactured in the United States
Includes:
Air Helper Springs
Supports
Hardware
Air Line
Inflation Valves