thumping noise during turns - not cv joint

I've got a 96 Accord that I've been fixing up for a friend that has a odd
thumping noise during left turns. I figured it was CV joint related since
both were blown on the outer boots, but the nooise hasnt changed at all. It
developed shortly after replacing the lowering springs that came on the car
with the orginal stockers. Visually I cant see anything wrong except for a
strut bar bushing thats cracked on the left side and a cracked front engine
mount. Neither are severe enough to be causing this noise (I think??). The
noise seems to occur on 90 deg left turns only while the wheel is
straightening back out. Rarely does it occur while turning the wheel left.
Noise isnt speed dependent and just sounds like a metal on metal clunk
coming from the engine compartment. I've gone over all the suspension and
all the components are tight and in good shape sans the sway bar bushing.
Any thoughts??

thanks!!

jeff