I have spent two days now researching this damn swirl flap/arm problem. Plastic parts won`t work here. But there is a German guy who made it out from metal. Expensive, but still affordable.
https://www.ebay.co.uk/itm/volvo-s60...r/112994806639
His video:
https://www.youtube.com/watch?v=k6oPMhsO5qY
What do you think ?