Just got around installing the roof rail and cross bars and as expected they were noisy. I had an extra set of cross bars from my Volvo xc90 that were extremely quiet and decided to look around and see if I find any obvious differences in their design. The Volvo has a a rubber piece on the top center with small slits that are design to break the window over the cross bar . I went ahead and installed the rubber on top of the existing rubber on the Toyota cross bars and the noise is largely reduced. For those who are interested I believe the rubber piece can be purchased on Amazon as well.