~(650 lbs. 48X40X24)~ 2003-2009 GM 4500 5500 4-Link Rear Air Suspension Fits 4x4 models includes rear sway bar

The Kelderman KLM17400 is a 4-Link Rear Air Suspension kit designed for 2003-2009 GM 4500/5500 series trucks. This system replaces the factory leaf springs with a four-airbag setup (two per side) to enhance towing and payload capacity, while also improving ride comfort. The kit includes adjustable trailing arms for precise axle centering, necessary mounts, a crossmember, a rear sway bar, end links, axle clamps, air line, fittings, and Schrader valve inflators. It is upgradeable with the SLKD2WD system for an onboard air compressor, tank, height control valves, dump valves, air dryer, and in-cab controls, allowing for automatic ride height adjustment and lowering functionality.