Briggs & Stratton 5043K Air Filter Cartridge 3.5 - 11.0 HP Gross, 625-1575 Series Engines
Genuine Briggs & Stratton air filter cartridge used on 3.5 through 6.75 horsepower Quantum  engines and 625 through 1575 series engines.  Replaces Briggs & Stratton service part #491588S.