Get the 1 inch longer WIX 51356 that is listed for a ton of industrial uses. My RTV900 and X744 both would use the short 51365 but have no problem with the longer filter. You can even get the HD version XP filter in either filter. That gets you the mesh reinforced filter media.
thanks for all replies ... got the WIX 51356, looks ok and is a bit longer so easier to install