Installing headliner without rear pillar interior vents -- issues?

[cartel]

have a friend about to install a headliner in his dime and he has no interior pillar vents - its being custom made in alacantra

now if he has the headliner made and doesnt use anything will this cause any issues? the exterior vents are in place--

[iceman510]

What kind of problems are you considering, airflow? There's always the vent windows if nice weather. If they are to be added later, that doesn't pose a problem. I cut the holes and installed mine after the headliner was in place.