Fitment and Product Information. Air Lift 25491 Smartair II Dual Path Suspension Helper Spring Compressor Kit NEW. Brand Name: Air Lift Performance. Country of Origin: USA. 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. 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) is a dual-path system, meaning that the air springs can be independently adjusted to different pressures, perfect for uneven loads. Dual path systems help to prevent air transfer between air springs, which provides a more stable cornering situation and significantly less body roll. 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, ORG. MFR-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. For any air spring-equipped, leaf-sprung vehicles, SmartAir II (Dual Path) is the on-board air compre. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.