Rear suspension bushing noises?

[CarsSuck]

I've been hearing a clunking sound from by trunk/rear suspension area for a few months now. It sounds like something being tossed around the trunk, but the trunk is empty. It happens only when im turning or accelerating or some combination. I've checked just about everything for looseness, so lets assume its none of that. What bushings cause this? Rear-subframe, trailing arm bushings, diff mount?

The car has recently gotten new bilstein sports (and mounts), h&r sports and that has been it for the rear. Front has new tie-rods, CAs, CABs shocks, springs, swaybar links. TIA

[PiercedE30]

I would say RSM's are your problem.

[Marvin_Hecht]

Pull back the trunkliner near the antenna (on both side) and
look to see if on rear shock mounts the donut portion has
separated and pushed the shaft higher/ poked through. If so,
it may be because whoever installed it forgot re-install the lower
gold disk which distributes the pressure...ask me how I know.

This pic shows the sequence of hardware bits that should
be there:

[nefarious7907]

thats kind of a bad angle, but the washer on the bottom is that the one that should be in the shock boot? The top washer should be a bowl shaped one and should be facing up like you would eat out of a bowl.