Replacing 4 ohm drivers with 8 ohm drivers (Wavecor WF182BD03/04)

I have been trying to source the Wavecor WF182BD03 for a project, ufortunately without luck. Instead I have found the Wavecor WF182BD03 which seems to be the "same" model, just 8 ohm instead of 4 ohm.

Is it possible to calculate which modifications would be needed in a filter designed for the 4 ohm version in order to use the 8 ohm version instead?