Air Lift ProSeries 5000 Air Spring Kit - For AT4, AT4X, ZR2 & Trailboss

Built on the proven LoadLifter 5000 platform, the ProSeries 77XXX line provides reliable load leveling, improved stability, and better control when towing or hauling – installed by experts who know your vehicle best. This installer-exclusive line ensures proper setup, peak performance, and long-lasting support for any heavy-duty demands.

• Provides up to 5,000 lbs. of load-leveling capability*
• Ideal for trucks and vans with leaf-spring suspensions
• Helps eliminate rear squat, trailer sway, poor headlight aim, body roll, and bottoming out
• Fully air-adjustable from 5–100 PSI to match any load or driving conditions
• Includes upper and lower roll plates for added durability and abrasion protection
• Many applications install with no drilling, using factory frame holes
• Designed for towing trailers, hauling cargo, and daily load-bearing duty
• Available only through Air Lift Authorized Installers for expert setup and support
• Covered by Air Lift’s Limited Lifetime Warranty and 60-Day Ride Satisfaction Guarantee

*Do not exceed the vehicle manufacturer’s Gross Vehicle Weight Rating (GVWR)