A-AF1827J Filter, Air (QTY 1)One New Aftermarket Replacement Air Filter Replaces Fleetguard AF1827J This replacement air filter replaces the Fleetguard (Cummins) AF1827J primary air filter. Air filters protect the engine by preventing dust, dirt, and debris from entering the intake system, helping maintain engine performance, reduce fuel consumption, and extend engine life. The A prefix designates this as an aftermarket replacement part. Compatible Brands and Applications Cross