Can't give measurements on how low it dropped the car, because it's still missing a lot of weight. Wouldn't be able to get true measurements unless I was comparing fully assembled car before and after. Like you said I doubt they would compress a whole bunch if the spring rate is 250#. It was covering up about a half inch of tire as is. I called them, told them I want my money back. They want me to pay shipping back to them and then they will evaluate them to see if what I am telling them is true. They claim it could be from improper installation. You would really have to screw up bad to improperly install a spring, especially in the rear. I told them no thanks, I'll give them poor feedback and file a claim with paypal as Tony SS suggested. They said OK, go ahead. So that's what I did. Paypal case pending.............