without a VIN, hard to say. it depends on the car;
I attach the brochures below.
the original 03-04 spec-c with 5x100 PCD
http://www.perth-wrx.com/vb/impreza/...00-2004-a.html
then were was a limited edition 04-05 spec-c has 114.3 PCD
http://www.perth-wrx.com/vb/impreza/...ed-2004-a.html