Adjustable Air Helper Springs The load and towing problem solver Air adjustability is the difference! Stiff steel factory suspensions must compromise between ride comfort and load hauling capacity. Smooth ride suspensions can't carry heavy loads; heavy springs ride rough, especially when the vehicle is unloaded. Air Lift adjustable air springs solve these problems by allowing you to tune your suspension under all load and road conditions. Just add air when towing or hauling and then remove air for a softer ride when unloaded. Features and benefits of Air Lift 1000 > Improve ride, handling and stability by reducing roll, sway and bottoming out > Fits open coil springs, front or rear > Up to 1,000lbs of leveling capacity > Tough long-lasting moulded polyurethane construction > Quick connecting easy-to-use engineered polymer air fittings DA5010 Defender 110 & 130 DA5011 Defender 90 / Discovery 1 / Range Rover Classic Load Controller II - The economical, popular, basic on board air system DA5012 This system controls the rear bags equally. All kits include wiring harness for fast, easy installation. To eliminate the major cause of air spring failure, the low pressure sensor automatically activates if pressure falls below the minimum safe level.