A-B1271962S-AI FILTER-A/C FOAMOne New Aftermarket Replacement Foam Air Filter Pre Cleaner Fits Briggs & Fits Stratton (B&S) Engines This wrap style foam pre cleaner mounts over the air cleaner cartridge filter to provide an additional layer of filtration on select Fits Briggs & Fits Stratton vertical shaft L Head engines used in lawn tractors, riding mowers, and other outdoor power equipment. It traps dust and debris before they reach the main paper cartridge, extending cartridge