Briggs & Stratton® 5428K Air Filter Cartridge with Pre-CleanerBriggs & Stratton Air Filter Cartridge with Pre Cleaner fits Intek 13. 5 19. 5 Gross HP Engines and Model 31 Engines. Filter provides the first line of defense against the destructive effects of dirt ingestion. The Pre cleaner adds a second layer of protection against airborne dirt particle ingestion. Air filter cartridge #796031 with Pre cleaner #797704 Filter provides the first line of defense against the destructive effects of dirt ingestion Pre