Roof rack anti-whistle / whistle stopping strips
thingiverse
Should fit a lot of after market roof racks that have about a 22-23mm sliding accessory track ... Simply remove the rubber insert and replace with these - you will need 4 or so to make it across - keep in mind I left room at either end to install an eyelet to ratchet to... (see photos) and you may need to extend the length of each to make it fit for your application. Also - please note that printing in ABS it will shrink so depending on your filament - 101 or 102% scaling may be needed. This eliminated ALL of the whistling from my roof rack - I just needed it on the front rack for my 2013 Prius - but you may need to print for both depending on the airflow across your vehicle. Found similar products that were $20 per rack to purchase - this works just as well in my opinion.
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