I got a NA S4 and was thinking about hooking my 5th and 6th ports up to the airpump cuz of the backressure issue with installing a new exhaust. ON the racing beat website it says that their exhaust is specially made for rotories, so does that mean that the racing beat exhaust creates enough backpressure to open the ports or should i still hook the ports to the airpump?

 

Install it, and see what happens!