Car Humps Ground...
Any ideas?
You say that your car is lowered, but how low and with what? The reason I ask is because if you used something like eibach sportlines and placed them over the stock shocks, then I can see why you're having the problems you are having. While many will say that it's okay to use springs that yield really low ride height while using a soft spring rate and in addition using the stock shocks which have poor valving with even the stock springs, you get the problems you mention. Also the stock shock may be very old, which can result in the "bathtub" momentum you're getting from the vehicle.
AFA the reolcation brackets, they may or may not be necessary, but I can say that when they are needed, it isn't due to the problems you mentioned.

