I have no fitment issues, but especially with the z1 style Dualz it would be nice to have a shorter filter to get away with the buck teeth look. Maybe even help get them out of the ram air stream. I wonder if they flow as well as the 5in version.
The inner cone shape without being just capped off at the top may even eliminate the need for some people to "induce turbulence" by putting tape on the filter.