2pcs/lot Air Filter for Briggs&Stratton 491588S 491588 399959 Quantum Series 625 650 675 Mowers Replacement PartsFor Briggs and
Stratton Side Valve Engines Engines: Quantum Series 625, 650, 675 (Current Engines), Model 12 seriesAlso fits some horizontal crank engines used on generators, cement mixers etc. Replace Part No.
For 491588S 491588 399959Include: 2 x Air filter.