After you lower your car, you are going to need to get an alignment. You will more and likely have to get a kit for your car to adjust the alignment, since you droped it that much. If you dont drive your car alot, and dont put many miles on it, then you really dont have to worry about it. If you put a lot of highway miles on it, i would defiantly get an alignment right away. I went threw a set of front tires in 3 weeks with my alignment off.