A-B1697292-AI FILTER-PRE CLEANEROne New Aftermarket Replacement Filter Pre Cleaner Fits Briggs and Stratton Small Engines This flat panel style, foam pre cleaner fits over the main air filter cartridge on select Fits Briggs and Stratton (Fits Briggs & Fits Stratton) OHV small engines. It captures airborne dirt, dust, and debris before they reach the primary air filter, adding a second layer of protection that helps extend engine life and maintain peak performance on lawn mowers,