Im looking to lower my stang.

For the price of those I would spend the extra few bucks to get some FMS springs. At least I know my FMS springs are going to last, what they are rated at (spring rate) and if I want to drop it some more I can take out the isolators or cut a coil (instructions came in the box). I didn't want to go too low with mine so I looked at spring rates and wanted a nice firm ride as I am used to my truck anyway.

Just think about it before you buy, to me they look like Honda springs that someone realized would fit on a mustang...

Chris