Air Lift helper airbags provided load-leveling functionality for the rear suspension. Off-Road Unlimited began with Air Lift's Ride Control 59544 leaf-spring leveling kit, but had to modify it to fit the way we needed it to. So, we ended up using the air bags and making one-off mounting brackets that included an innovative quick-release pin that disconnected the 'bags from the springs. This allowed the suspension to droop without stressing the air bags for when the vehicle was not resting on the ground.
2006 Ford F150High And Mighty: Fabtech F-150 6 Inch Lift