Air Lift Performance 3H is our most advanced air management system yet, and it took three years to develop and test until it met out standards. The system combines an easy-to-use and reliable air management with a design that stands the test of time. 3H combines pressure-based control with ride-height sensing technology. While both types of air management have been utilized before, this product harnesses the power and benefits of both systems – instantly improving suspension control, performance, and vehicle ride flexibility. This system allows for precise ride height, customizable settings and convenience for the best personalized driving experience.