Air Conditioning & Heater Part. Interior & Exterior Parts. Wheels, Tires & Parts. Rear Air Spring Helper 5000 lbs Suspension Kit for 2WD & 4WD Kit for Ford F-150. It is designed to maximize the vehicle’s safe load-carrying capacity, stability, ride quality and brake effectiveness. Air helper springs provide load support through the use of air pressure that can be adjusted for changing loads. They enhance the ride by reducing inter-leaf friction. It helps steering control and braking effectiveness. It softens contact between the axle and the frame to reduce bottoming out. Requires 8 of frame to tire clearance. Air helper springs will not increase your vehicle’s weight-carrying capacity. No need to drill, easy to install. Increase stability and improve ride quality. Keep your vehicle level when you are hauling a heavy load. Improve steering control and braking when you are hauling or towing. Reduce strain on rear suspension. Test more than 3,000,000 times: Durable and Safe. 24 hours air tightness test? 0.02MPa: Air Tightness Guarantee. Temperature Range? -40? /? 70? : Premium Natural Rubber Material. Placement on Vehicle: Rear left and right. Adjustable Air Pressure: 5 psi to 100 psi. In-Bed Hitch Compatible: No. 2x Heavy Duty Double Bellow Air Ride Suspension bags. 6x Upper and lower mounting brackets. International Buyers please Note: a. These charges are the buyers responsibility. Warm reminder: If the package you received is damaged during transportation, please provide three or more photos. We are committed to achieving 5 star ratings. We will try our best to resolve any kind of issue.