These are not real coilovers, but a kit to convert your existing struts into weld-on coilovers. This is done frequently on the front suspension of our cars if you want to keep S12 parts instead of converting to S13 front suspension - see this:
http://club-s12.org/retro4/index.php?topic=33389.0Doesn't even work for the rear. Again, see that other thread.