Nope
All you need is a T-juntion coming out of the solenoid.
Plug one tube to one cylinder and the other tube to the other.
Repeat for the other end of the cylinder to the other output.
Just look at the airflow and it should be pretty clear.
-edit-
I just looked at your question again, what you mean is, be able to independantly control them? or have them perform the same or opposite actions at the same time?
__________________
Patrick Wang
WRRF
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