I have H&R Sport with KYB AGX and I hear a clunking noise on the rear springs everytime I go over a bump.
I have been told that spring silencer might solve the issue. Does anyone know where I can get these?
NOTE: If there are 4 people in the car I do not hear the clunking noise.
If you guys know another solution, please share it with me. Thank you

 

The spring coils may be clanking together on rebound and compression and once more weight is in the car the springs don't separate as much.

I have the same springs, but I've never had that problem.

 

and also If I set the KYB AGX to a stiffer setting the clunking noise is heard less fequently.