There is a single nut at the bottom of the bulbous portion of the intake, it is a 13-14 size wrench, and you do not have to remove the nut, just loosen it, the bolt fits into a slot that the nut tightens down on. So removal is not needed.
It's lucky that it does not need to be removed, because it is a bear to reach, you can try to get it from the underside, but I usually kneel on top of the engine and reach down, one's hand and arm are still a tight fit from either direction.
If you choose to kneel on the engine, be sure to remove the plastic cover on the head first.
DanR '94 964 353,000 miles (119,000 miles on the new engine)