Not to take anything away from Brylek's reasoning, here is my angle if that helps. My would squeek and WD-40/3-in-1 was the answer good for about a month, but recently it developed the clunking noise.
After reading more threads from others who have the similar problem, I bought 8-J flange bearings($45) from igus before I took the camber pivot kit apart thinking the bearings may have worn out and needed replacement.
Upon inspection, all of my bearings looked really good but Thom used one sleeve bearing and one flange bearing for the pivot and the sleeve side was causing the clunking noise. I wasn't able to re-tension the pivot like NSXCessive as they were max-ed out towards each other with no room to move what so ever.
My quick and dirty method/only option w/o pressing out the old bearings to take care the 2mm gap problem was with a hard rubber "JDM" bushing made by Mugen which I found at HomeDepot and after 500 shakedown miles my car is
still quiet as a mouse. If the bushing shall fail in the future, I can replace all of them in about an hour.
I still think Thom's camber kit is a fine product, the only change I would make is to use the flange bearing on both sides of the pivot not just one side. The problem was the ~2mm gap developed over time(not sure how) which is the thickness of the flange on the igus bearing.