When going for forced induction with ITB's why do you...

[Waitey]

Remove the butterflys from them?

 

[mini-valver]

You don't have to. Ben P is doing as he is running ethanol injection and N2O so theres no room in the runners for everything and he'll get better flow and power by usiing them as an inlet manifold.................Or something along those lines, lol.