A-B15047K-AI FILTER-A/C FOAMOne New Aftermarket Replacement A C Foam Air Filter Fits Briggs & Fits Stratton Small Engines This foam air cleaner filter element provides protection against dirt ingestion for select Fits Briggs & Fits Stratton small engines. The foam element fits inside the air cleaner assembly and serves as the primary filtration barrier, keeping abrasive particles out of the carburetor and engine internals. Compatible Models Fits Briggs & Fits Stratton: Select 3.