Polaris RZR Parts For Sale WTB 2012 900XP4 UMG super filter kit December 18, 2015 New member looking to purchase aftermarket air box kit for 2012 900 XP4. I think the part number is 29037XP. Thanks in advance, Jim Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related