Severe wind noise - Cab vents?

[Minuit]

I'm getting a very loud (loud enough to make the truck unpleasant to drive) rustling, windows-rolled-down type noise coming from the B-pillar at speeds above 50mph or so. All weatherstripping around the doors and window area are new, and the sound is concentrated around where the seat belt pivot is bolted to the cab, so I'm almost positive the cause is the plastic cab vents. Removing the cab vents seems to make the noise considerably quieter. I've already tried making foam gaskets around the perimeter of the vents, but that seems to make the noise worse. Is this a common problem, or am I just losing my mind? There's no way this is normal. The rustling literally sounds like the window is wide open. 

 

Here are some things that I know it's not:

 

- Door seals. They're brand new and were installed properly.

- Vent windows. They're properly adjusted and silent at any speed. Opening the vent window makes the B-pillar wind noise go away.

- Door to body alignment. The door is perfectly aligned with the body.

- Glass run seal. Also recently replaced with no change.

[Akula69]

We have also had problems with noise from the cab vents and found the little rubber flaps are getting stiff from age (sounds like a bunch of leaves in there at 50+ MPH). I took some foil tape and cut it in a strip about 1/2 wide and long enough to adhere to all 4 of the rubber flaps - sticking it right down the outside center vertically. Don't know how long it will last, but it seems to cut the individual movement down considerably while still allowing the air to vent when closing doors.

 

Ultimately I'll probably take some nitrile rubber sheet and make new, more pliable flaps.

[big66440]

I put Gorilla tape over mine, problem solved.