i bought my wrx used, and I believe it may have group N strut mounts. He actually referred to them as bushings, and I know there are group N control arm bushings and such, but he said that they make a very considerable difference in handling. Is there a way I can tell?

I just need to know, because if they are I can buy v7 springs to go on v8 struts (correct me if I'm wrong here)