IS A PRIMARY AIR FILTER FOR AF471 For Outer Air use AF472 or AF4506M depending on the application. For Magnum Version use AF471M. 3311624 Bolt Seal Included
IS A SECONDARY AIR FILTER FOR AF437K For Magnum Version use AF437KM. For Flame Retardant version use AF4545K. 3311624 Bolt Seal Included
IS A SECONDARY AIR FILTER FOR AF437KM Extended Life Version of AF437K. 3311624 Bolt Seal Included