The gap between the front roof rack brackets and the roof rack seems to causes
a good amount of wind noise at freeway speeds. As an experiment I used some heavy PVC
plastic tape to bridge the gaps. With the tape in place and at 75 MPH on the freeway I
eliminated a lot of wind noise. Yes, the tape is only a temporary solution until I
come up with something more permanent. Between replacing the large knobs and
taping over the front gaps I have been able to reduce the wind noise to a level I like.