I have Bilsteins on my setup and I get a loud popping noise coming from the drivers side on mine when I'm in 4x4. Mine will feel like it's binding up like I'm using 4x4 on dry pavement and then pop loudly. Usually happens only when turning at least a little bit and gets worse the further I turn the wheel. I don't know that the Bilsteins have anything to do with the noise though. I'm still looking for answers to fix mine.
2007 Black F150 Lariat 4x4 Screw, 5.4 liter V8, 6.5' box...
RCX 6" Lift, 6" Lift Bilstein struts/shocks, 20x10 MotoMetal 951's, 35x12.50 Toyo Open Country M/T's, Bushwhacker Pocket Flares, Flowmaster Super 44 Exhaust, Rugged Cover Folding Tonneau Cover, Gryphon, Hood Scoop, K&N air filter, Python 580 2-way remote start, 20% tint