Yes. You can replace the pistons without removing the motor. There is a lower crankcase/windage tray/girdle (or whatever you want to call it) that you have to remove that's above the oil pan. It's not that hard to do though.
Dominant Eng. orp, ITG Maxogen panel filter, Focus-Power tune, Team Dynamic Pro Race 2 16x7 wheels in black(36 lb weight reduction from stock tire/wheel combo)