07 Prius front end clunk when going over speed bump

Hi there, some background on my 07 prius with 140k miles

I have swap out the front sway bar and endlinks with new 05 Corolla replacement, I lower the subframe to swap out front swaybar, after test drive, car handles great, however there is this annoy clunking noise when going over speed bump, I made sure to greas the new bushing before installing, and check all the bolts were tight to factory specification, and since the swaybar bushing and endlinks are new, so very less likely they are the culprit, any ideas what this clunk noise might be? sounded like the new sway bar banging the chassis or subframe?

only heard when going over speed bump, or sudden drop in elevation. Uneven road suface, lane markers or person hole cover does not provok this noise.

last, i don't really remember if this noise is present before I replace swaybar, it could alway been there

 

I disconnect the endlinks and went on another test drive, it only develope more noise, and original clunk sound still present

could it be engine mount? might have to pay dealer a visit

 

I beleive the motor mount and struts were never replaced, but they were visuly inspected ok, I intalled spoon rigid collars along with the new corolla replacement swaybar and reuse the endlinks that aprear in good shap.

I did not replace the struts while was down there because I do not need to remove any suspension conponent to install above said parts. and struts were inspected ok, no leak and mounts, spring seats and rubber insulator between them were all in good shap, however I have a set of coilover coming my way, will see if that help with the clunk.

I have disconnect the endlinks from struts, then went on test drive, it does not help with the clunk in the video, so I put everything back and torque it to factory spec. car drives amazing, with the benefit of upgraded swaybar and rigid collars, which improve "turn in feel" and mid-cornor staibility.

I'm still very puzzeled on what it could be, here are few pictures i snap during installation!

what do you think?

 

^ thanks!
coils is coming in next week, will report back after the install

 

After I install the megan coilover, same noise still present
so I remove front swaybar completely the went on test drive, the noise is gone, not a single clunk, it rides speed bump so quietly like it should everything just feel right! so concludes that either swaybar(corolla replacement) or endlinks(original ones) was makeing the clunking noise
now I'm driving around w/o a front swaybar, i notice less road feel through steering wheel, also feel little mushy
I'm debading if I want to throw front swaybar back on!

 

Update: put front swaybar and endlinks back, went for a test drive, no noise!! Must be cause I removed two of the rigid collars as well, when I remove the swaybar earlier.
finally the fault is the two of the rigid collar bushing did not seat flush where subframe and chassis meets, so it clunks whenever I go over large bump, removing them cures the clunk!

Thanks everyone for replay! thread close!

 

I loosen the steering yoke bolt, so it disconnect from rack when subframe drop, I did not have to remove additional parts, just drop the subframe far enough to have the swaybar come out from rear.

Here is few pictures of the said falsely installed rigid collars, edge deformed due to subframe were bolting back at an angle and squeeze on the the collar.. n that created lil cap that makes the clunk!