[oscar89]

There ara a couple of things that you should get sure about.

What parts where exactly changed in yours doughter cars. Was it only the springs or the spring strut assembly. Was there any changes in the steering components.

After all of that clears out you should get oem specs parts. If they only chenged the spring then you'll need to replace the springs.

Yes you need special tool to remove the spring. You need a ''spring compressor'' got to your local autozone the'll rent you one. After that regular tools should be enough.

Also you may also want to buy a haynes repair manual. I beleave that autozone sells them too.

Hope this helps