These are Ground Control coilover springs (made by Eibach), but should be fine with any coilover that uses a 2.5" interior diameter spring. Have about 20K miles on them, no signs of issues. Good for a fairly aggressive street or auto-x tilted setup.

Note that these require coilovers; these aren't just aftermarket springs you can fit to your regular struts.

$85 picked up / local meet ($95 shipped)