Heard the STi interior can fit in the RS. Anyone know if that is true, and if so, What year it needs to be?

Carpet, seats, and dash are fairly easy swaps, door panels won't work for the coupe though. If you have a whole STI donor to do the swap with you'd be best served by taking the complete wiring harness out of the donor and using it for your swap. The wiring plugs that will need work that way would be head and tail lights and door wiring.

Hi Brian  This is Jerry, i have a 95 impreza coupe with black interior and it has 07 wrx seats in it. I am looking for stock seats for my coupe, what do you have in your car? Let me know or call me 509-952-2855  Thanks Jerry