They will do chap but the hassle would be re-shimming the valve caps and re-setting everything, so it's generally preferrably to buy the whole head. There's lots of speculation on the actual "statistics" of the FHE camshafts, but regardless, they have extra lift and duration over the FTE camshafts, and they generally work well to extend the powerband.
So yeah, they're stock 5E-FHE hardware, which is an upgrade