This Lincoln Town Car Air Suspension Conversion Kit with Rear Shocks Kit includes: Coil Springs to Convert the vehicle from Air Suspension to Conventional Springs and Rear Replacement Gas Shocks. This kit will keep the rear of your car at factory height while providing a smooth ride. The Town Car conversion kit will eliminate the air suspension problem forever. How to disable the air suspension light is provided in the instructions. Rear Gas Shocks should be replaced every 50,000 miles and are included with this kit. For safety reasons your Rear Gas Shocks should be maintained for these periods.