I have a 01' Coupe I4, and i just put Eibach pro kits on my carand the second i drove it there seemed to be a clicking noise coming from the rear suspension whenever i would go over bumps. Or generally , when there is weight transfer towards the rear of the car. I figured it might be the Rear Sway Bar, so i took it off, and now the sound is gone. Im guessing that it has something to do with the Endlinks, but they look in fairly good condition. The plastic sleeve part near the ends are still intact. My guess would be that the noise was coming from the bolt that holds the Endlink to the Swaybar. Perhaps there was to much pressure on the bolt from the lowering springs?

What do you think the problem is?

 

there's two thing that could go wrong

1)the endlink is toasted, the oem one is undersized and break constantly, honda realize the problem and they make a thicker link which you can buy in the dealer.
mine was broke at the plastic dot

2)when you putting the nuts on make sure you have a hex inserted so the ball joint will not be spinning with the nut, if it's not fully tight/locked it will make noise.