Not sure if this is necessary or advisable [ like it's too restrictive ] but I see it being done and Can am's and other machines along with Kawasaki..
www.sxsnation.com
Anyone find anything like this for a KRX and what are you thoughts?

Teryx4 Inner Air Filter
Hey folks, wanted to let you all know i found an inner air filter that'll fit inside the OEM air filter. It fits rather nice and is a little added...

Anyone find anything like this for a KRX and what are you thoughts?