Mine has been pretty bad...

i've had end links changed twice - the knocking always comes back...

/edit oh, and i've had custom collars put on so the sways don't slide left or right - didn't help either. wish i bought stillen...

had mine about a year, no problmes so far.

Are you sure that endlinks are tight? If you can't shake them by hand doesn't mean that they are tight.
I tightened them to about 75 lb/ft and had no problems since.
There's nothing else to clunk, even if swaybar slides without collars.

Imma try to tighten them down as tight as i can.. it's jsut hard with that thing that u had to bend moves with it... i have tried clmping it but it's pretty hard to keep it from moving.

That "thing" on endlink shouldn't be bent(ST instructions tell to do so as well, but I didn't)
I rotated it, so it sits on top of sway bar acting as stopper. It doesn't interfere with adjustability and allow tightening with only one tool.

^^^ hm... 05 end links... hm...

I have the old hotchkis bars with the collars on the inside. (I checked when I did my oil change). Never heard of any clunking. If it's happening more frequently, I'd open each side's window to see if you can determine if it's the left or right. Then maybe get the car on some ramps and get under there and see if you can move any of the parts easily.

bump same problems here, its as if the bars dont' line up exactly

i'm having knocking problems w/my eibach sway set in the front.. i've tightened the endlink bolts and the knocking goes away for a few weeks then comes right back.. not sure what else i can do.. bringing it to the dealership for my 15k service and gonna ask them what's up. i have an 05 by the way.

year and half, no problems yet.

mine's clunking on every time theres chasis flex

No clunking here. Did you grease up the bushings?