Found these while looking around on another site. Has any one had any experience with these guys? would I need anything else other then the springs to use these?

http://www.ingallseng.com/16009-1-lowering-springs.html

 

I have never heard of the company. Any time you lower a car there is a list of parts that you should also get. When you change springs change your shocks and sturts also, get a adjustable panhard bar. You can also opt for a adjustable UCA, and CC plates or Camber bolts for alignment.