Theres this weird "CLUNK" noise that is coming from the back of my car, i lowered it and its annoying. When i go over bumps and it bounces is makes the sound but overall car drives smoothly and handles well. CAN ANYBODY PLEASE TELL ME WHATS WRONG?

 

well, tbh, it sounds like wheel rub. aka one or more of ur wheels are hitting ur fender, or something like that, or depending how much u lowered, you could also be bottoming out

 

Could also be a rusted out upper rear strut mount and the strut is hitting where it should be mounted to ..... seen it in a camaro.