legacy calipers on impreza?
 

Will the calipers from a legacy outback v rev (2.5 petrol iirc) fit on a 2.0 sport impreza wagon, s reg? thanks

Most front Subaru calipers are interchangable.
If you are asking if the calipers witll fit using the standards discs and pads, then its un-likely.

Ok so what would I need to change to make the calipers fit on the impreza?

The front calipers on nearly all Subaru interchange. You'll just need the disc and pads from the new calipers, rather than use sport ones.

Right ok mate cheers