A header for an agricultural vehicle includes: a header frame； at least two row dividers carried by the header frame and defining a gap therebetween； and a crop material saver disposed in the gap and including a pair of saver flaps, each of the saver flaps being positioned such that the saver flaps co-act as a one-way pass-through to allow crop material flow past the saver flaps in an admission direction and inhibit crop material flow past the saver flaps in an inhibited direction opposite the admission direction
