Regardless of the environment you ride in, the MTNTK Performance DUAL STAGE FILTER kit is a must have for the Polaris RZR 900 S/XC/Trail. The DUAL STAGE FILTRATION SYSTEM allows for more air and keeps dirt, dust, and sand out of your engine. The newly designed system is durable, easy to install and affordable. Don’t let the elements restrict your performance. MTNTK Performance has the answer in the DUAL STAGE AIR FILTER.