Air cleaner for CVT cooling intake.
This is the hot tip given to us by one of our forum members and riding buddies. Unfortunately for us, we learned about it after the dune sands damaged our CVT.

Using a UNI two stage filter you can in a matter of minutes protect your wallet and your CVT from expensive repairs. The unit fits right on the end of your snorkel tube and replaces the rain shield from the factory that’s right behind the driver’s seat.

Not only should this always be used when playing in the dunes (based upon our first hand experience) it's not a bad idea to run this filter in most any dusty situations.