I wrapped the top and bottom coils of the springs with electrical tape, and that got rid of most of the "pops" but every once in awhile the suspension still creaks - it make a metal-to-metal settling noise. It must be from the top aluminum retainer against the shock shaft. Nothing that bothers me, every day I love these things more and more! I've noticed the car rotates around much better than stock; it feels flat and doesn't plow nearly as much. I've had to re-learn all my favorite corners, and I seem to be driving the car faster than I usually do. The Group 4s have made my car more addicting to drive, as I'm loving the steering feel. I wish I could get more caster though - the ALK improved the straight-centering of the car, but I'd love to have, say, 10 degrees (actually I have no idea if I'd love that, but a little more would probably feel better.) Can you Whiteline guys do that?