For what car? GC/GD fronts are the same but rear top hat mounting bolt spacing is different. 04 sti is also compatible with 02-07 impreza and wrx. 05+ sti got a larger lower clevis joint on the struts.
It’s for a gc8 2000 Subaru 2.5rs coupe. I heard that if I get 90-91 awd legacy rear top hats, I can fit the sti rear suspension