Clunk/knock noise over abrupt bumps

[TangALang_BK]

I am really struggling to figure out what is causing a knock noise over abrupt bumps. I believe the noise only started occurring after I lowered the car on track strut and shocks, and RTR lowering springs. I have checked everything 100 times and completely ruled out anything sway bar/end link related. It seems the noise is more prevalent from left front but I did a bunch of swap testing and even re-installed the left front OE strut/spring assembly and the noise can still be heard. Any experienced technicians have an idea? I’m leaning towards noise coming from one of the lower control arm bushings/ball joints because of suspension geometry change…..I have yet to get an alignment because I want to figure out this noise before and the drop was a 1.1” front and 0.8” rear subtle drop….doubtful any alignment would fix it. Thoughts? 20M GT PP1 with 8k miles.

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[TangALang_BK]

Looks like I didn’t need anyones help here after all. I found that both springs make coil to coil contact at the top on both sides. Everything was installed properly by myself.

 

[PC_GUARD]

Looks like I didn’t need anyones help here after all. I found that both springs make coil to coil contact at the top on both sides. Everything was installed properly by myself.

Progressive springs?

The steeda sport Progressives did that hitting a dip square. I thought it was endlinks

Although when I pulled them apart, passenger side was upside down, drivers was not in the pocket correctly.

 

[TangALang_BK]

Yeah progressive. What drove me nuts is that I knew everything was installed properly .

 

[Oakley]

did you ever get rid of the clunk?

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