well i bought obd1 injectors and i need to change the lower intake runners so they would fit, im looking at the obd1 and 2 lower intake runners and there almost the same, but the obd2 runners have a line coming from it. what would i do if im getting rid of the obd2 runners that have this and changing to obd1 runners that dont.
heres a pic hopefully of the obd2 runners with the thing i was talking about. what is it and is it needed...?

heres the obd1 runners that dont have em.

what should i do.
heres a pic hopefully of the obd2 runners with the thing i was talking about. what is it and is it needed...?

heres the obd1 runners that dont have em.

what should i do.