I recently installed a full RB true dual exhaust system on my car. I realize the airpump must be retained for proper 5th/6th port operation.

However, must I retain the Air control valve? I have the Block off plate from racing beat and curious if this must remain on the vehicle.
Thanks,
-M

 

yes, on an S5 NA the air pump air is used to open the 5th/6th ports and VDI

 

yes, therefore the air control and check valve must remain?

I know the airpump must stay. But curious about the aforementioned , Thanks