17. The kit utilizes a cantilever behind the axle to offer a superior ride. This is the cantilever bracket. It was bolted to the frame mostly using the factory holes.
18. The assembled cantilever lets you see how the system works, with the airbag sitting between the bars. Being behind the axle means that it is supporting more of the weight. The dog-bone link, which attaches the cantilever to the axle, comes in different lengths, depending on the wheel size you want to run.
19. Since this kit is a parallel four-link, there is an optional Watt’s link (PN: KPC WLB-C31, $369) offered by KP Components to locate the axle between the framerails. To attach it to the axle, the diff cover bolts are removed and new, longer bolts are used to bolt the Watt’s link down.
20. Another trick feature with the KP kit is the fact that it can be expanded upon without modification. Here you can see how the side mounts for the Watt’s link bars integrate seamlessly into the step notch.
21. Before tightening all of the bolts down, we checked and double-checked to make sure the axle was centered.
22. With everything finalized and bolted down, the Watt’s link was finished. It was then time to move to the front.
23. Compared to the rear, the front is much less complicated. The first step was to remove the tie-rod ends from the spindle.
24. Next, the sway bar was unbolted and tossed in the scrap heap.
25. Finally, the coil spring was compressed, the upper and lower control arms were unbolted, and the whole assembly was removed and set aside in one piece.
26. The new upper arm was bolted to the factory studs using new hardware.
27. New drop spindles were bolted to the upper control arms with a castle nut and cotter pin.
28. In order for the airbags to be mounted up front, a plate had to be bolted to the bottom of the coil spring bucket. You can see the holes for the bolts and the air fitting in the plate.
29. To finish off the install of the LayArm kit, the lower control arm was bolted to the frame and the spindle.
30. We gave AVS a call and ordered all of the air suspension components. They are a one-stop shop and had everything we needed to get the job done. Everything from the tanks and valves, to the switches and wiring kits, and even the Slam Specialties airbags (not shown in photo) arrived in only two days.
31. After mulling it over, we decided to mount all of the air components behind the rear axle. We will then build a door in the floor of the cargo compartment of the Suburban to access all of the pieces.
32. After mounting the tanks to the plate, we installed the air fittings. This one is in the top of the tank and will be used to connect the two tanks together.
33. We will be running dual Viair 480C compressors, with one compressor feeding each tank. This should give us a fast refill time. Each compressor will be wired to its own relay.
34. In the back of one of the tanks we installed the pressure switch that will tell the compressors when to turn on and when to turn off. This unit is a 160 psi on and 200 psi off. On the back of the other tank, we will install a relief valve, in case something goes wrong and the compressors don’t shut off.
35. Finally, we could install the Slam RE-7 airbags and finish up the suspension.
36. This had to be the last step because we needed to first install the airbags. These Varishocks are included in the kit and are made from billet aluminum and are double-adjustable. They have two knobs to adjust compression and rebound.
37. After ensuring all of the bolts were tight, we ran the air line and tested the system.