The rear of the truck is lifted via 5-inch blocks and they utilize built-in bumpstops. They replace the stock blocks. The instructions direct how to align the center pin in the rear hole of the block to ensure that the axle is moved slightly forward and the wheels are aligned properly in the wheelwells. The kit contains new U-bolts and plates and the owner of this rig chose to upgrade to the BDS 9500 Series gas-charged shocks (the kit comes standard with 5500 Series hydraulic shocks). The 9500s feature a brushed stainless appearance, a 46mm piston, urethane bushings, and Correct Application Valving (CAV), which BDS says is based on extensive shock dyno and ride control research.