Description Fleetguard AF27994 is a secondary (safety) engine air filter element with cellulose media for heavy-duty air intake systems. It is used with primary filter AF27993NF and service cover SP1307 and supersedes Fleetguard AF27695, with cross references including Caterpillar 2673005, Baldwin RS5744, Komatsu XA4291, Liebherr 11699070, Sandvik 1036077, WIX 49605 and equivalent applications such as Caterpillar 785D and 793F mining trucks.