I just installed a set of Velvet Rides last night, and, unloaded, the ride height is exactly what it was before. In fact, I could still slide the old shackles over the bolts that protrude from the VRs. It may lower the rear of the truck a tad under some load, but it will be minimal, probably not more than 1/2". I have a call in to see if longer arms are available so that I can level the truck a bit.