So i lowered my car with eibach lowering springs. I know my car ride is going to be a little more rough, but I dont think its suppose to be knocking noises when going over bumps. Any suggestions on whats going on ??

 

^go back over the install.
something isnt tightened

 

or the springs got installed reversed- on the opposite end of the car,,thats happened before

or shocks are blown,, high mile stock shocks wont deal with lowering springs=
shocks pushed beyond their normal travel limit = the seals fail

it all starts with an inspection
control arm bushings are common