How this conversion kits works: this conversion kit is design to replace the air ride in your vehicle. Taking the place of the 2 air spring bags at the rear will be the coil springs. No longer will the vehicle need an air compressor to keep it at a comfortable ride height. The solenoids will now be an inactive part of the system, although they will still be needed for electronic purposes. The same thing will be true with the height sensors, control module, and the air compressor.
As with many vehicles there are gas pressurized shocks, 2 in the front and 2 at the rear, it is recommended that those gas shocks are replaced every 50,000 miles to maintain the suspension.
Here are some vehicles that can be converted with an Air Spring Bags to Coil Springs Suspension:
Air Spring Bag Strut to Coil Over Strut Conversion
Electronic Self-Leveling Air Shock to Passive Air Shock Conversion
Electronic Self-Leveling Air Shock to Passive Coil Over Conversion
Electronic Self-Leveling Air Shock to Passive Gas shock Conversion