Stuck Engine Cover Mounts - Cold Air Intake

[dadawg22]

Hi all, I'm trying to install a CAE into my FSI engine MK5.
I'm unable to remove the rear airbox/engine cover mounting studs WHT000898A near the firewall, using a deep 24mm socket just causes both to spin in place - plastic internals might have stripped.

Has anyone been able to resolve this issue without resorting to destructive methods? I don't really have any concrete strategies as to how I'll get those mounts out.

I'd appreciated any advice, I'm relatively inexperienced with working on cars.

[mjmallia]

I recall there being an allen key hole in the centre........it was a long time ago when I took that off for access though