The Air Lift 93399 ProSeries Air Spring Kit is built for drivers who want more than basic load support; they want premium hardware, maximum durability, and professional installation. This system helps reduce squat, improve stability, and restore proper ride height when towing or hauling heavy loads.• Provides up to 5, 000 lbs. of load-leveling capacity* to keep your truck level and in control under heavy loads.• Exclusive aluminum-anodized end caps and stainless steel end cap hardware.• Helps reduce squat, trailer sway, poor headlight aim, body roll, and bottoming out for safer, more confident towing.• Includes upper and lower roll plates that help protect the air springs from abrasion and can increase load capacity.• Fully air-adjustable from 5-100 PSI, so you can fine-tune ride quality and support for every load and road condition.• Designed for 1/2, 3/4, and 1-ton trucks with leaf springs, ideal for serious towing and hauling applications.• Many applications feature no-drill, bolt-on installation to factory frame locations for a clean, professional fit.• Only available from Air Lift certified ProSeries installers, ensuring expert installation and guidance tailored to your vehicle.* Do not exceed the vehicle's gross vehicle weight rating (GVWR).FITMENTtable, th, td {border: 1px solid black; border-collapse: collapse;}th {text-align: left;}th {padding-left: 4px;}td {padding-left: 4px;} Year Make Model Trim Drive 2017-2019 Ford F-250 Super Duty Single Rear Wheel 4-Wheel Drive 2017-2019 Ford F-250 Super Duty Dual Rear Wheel 4-Wheel Drive 2017-2019 Ford F-350 Super Duty Single Rear Wheel 4-Wheel Drive 2017-2019 Ford F-350 Super Duty Dual Rear Wheel 4-Wheel Drive 2017-2026 Ford F-450 Super Duty 4-Wheel DriveNOTE: Fits SRW and DRW. Fits factory in-bed hitch system. Does not fit the Commercial chassis. Fully adjustable from 5-100 PSI for a stable, level ride loaded or unloaded Helps reduce squat, trailer sway, & bottoming out for more confident towing Requires Air Lift certified ProSeries installers | Air Lift LoadLifter 5000 ProSeries Air Spring Kit, '17-'26 Ford F-450