A-B1311388GS-AI FILTER-FOAMOne New Aftermarket Replacement Foam Air Filter Fits Briggs & Fits Stratton Engines This foam air filter (311388GS) is a direct fit replacement Fits Briggs & Fits Stratton small engines commonly found in lawn mowers, riding tractors, and other outdoor power equipment. The foam filter element traps dirt and debris, ensuring clean airflow into the carburetor and protecting internal engine components from contamination. Regular replacement of this filter