A-B1270848-AI FILTER-A/C FOAMOne New Aftermarket Replacement Foam Air Filter Fits Briggs & Fits Stratton Small Engines This foam air cleaner filter (Filter A C Foam) Fits Briggs & Fits Stratton (B&S) 4 HP vertical shaft engines. It installs in the air cleaner assembly to protect the engine from dirt and debris ingestion, helping extend engine life and maintain proper carburetor performance. Specifications Filter Type: Foam element Engine Type: 4 HP vertical shaft Length: 4 3 4