I'm in the process of removing the intake manifold to install a cosworth piece (part of my turbo build). I can't figure out what hex key is needed for the two bolts that hold the dipstick tube against the intake manifold. Does anyone know? I've tried multiple hex keys and nothing seems to fit properly. I'm thinking that they might be stripped... If they are stripped, could I remove the intake manifold and just yank the dipstick tube out of the oil pan? The old tube has to come out anyway so I can replace it with the new cosworth tube. Let me know what you guys think!