Will the front rotors and calipers off an 05 STI fit on an 03? I know the rears won't fit.

The calipers will work but you will need to find 04sti front rotors, the reason is the bolt pattern on the 05 is 5 x 114 and 02-04 is 5x100

^ what he said and id order new rotors and pads

Thanks for the confirmation guys.