- Air Lift LoadLifter 5000 kits are this comapny's heaviest-rated kit. These air spring kits will fit most 34 ton and 1 ton pickups, vans, and motorhomes with leaf springs. This video will show you how to install the LoadLifter 5000 and start riding comfortably when hauling or towing. Get your Air Lift LoadLifter 5000 kit at www.4WheelParts.com.