Any know where I can find a 24m X 1.5 cap to go on the header air rail intake? Is that the correct size?
yes, M24x1.5. More info here: https://www.ferrarichat.com/forum/threads/secondary-air-delete.637752/ Not sure where you are in the world, but a decent machine shop will make you a set, or you could look for a specialist fastner/hardware place local to you.
