SmartAir II (Dual Path)Offering automatic vehicle leveling for leaf-sprung vehicles, SmartAir II (Dual Path) from Air Lift will have your vehicle back on the level in no time. The quick and easy automatic system uses a unique, non-contact magnetic height sensor to measure the height of the vehicle when weight is added to the bed, down to 1/16 in. . Based on the height of the vehicle, the system can intelligently determine whether the air helper springs need to inflated or deflated, as the load increases or decreases. SmartAir II (Dual Path) allows for the inflation of each air spring independently to different pressures depending on load. With the included, pre-assembled wiring harness, you'll be able to have your vehicle level and on the road in only a matter of hours. No air line or wiring needs to be routed to the cab of the vehicle, which eliminates the need to drill into the firewall and makes installation even easier. The fully-illustrated installation manual provides clear instructions to make installation a breeze. Made from weather-resistant, OEM-quality products, you can be sure that your SmartAir II (Dual Path) system from Air Lift will fit, work and last, and the 100 PSI, 0.92 CFM, 15% Duty Cycle, 12V, compact air compressor will get the job done fast. As the leader in air suspension products for over 65 years, Air Lift is committed to delivering quality parts that last. To ensure the highest quality, longevity, and customer satisfaction, the system comes with a two-year warranty and a 60-day, no-questions-asked, money-back guarantee -- not to mention the Air Lift reputation for great customer service and technical support, should you run into any snags in the installation process.