Genuine OEM Husqvarna, Outdoor Factory Parts Air Filter for Lawnmowers Husqvarna Part Number: 578450609 Alternate Part Numbers: 272235S, 5047H, 30-917, 4107 Produced for Briggs and Stratton engines that are commonly installed on Toro lawn and garden equipment. This is the foam air cleaner filter that helps to remove dust and other contaminants from the air that goes into the engines. Over time it may get dirty and clogged, this will restrict the air flow and eventually will need to be replaced. Fits Models: Briggs and Stratton 9B900 Series Engine 9C900 Series Engine 9D900 Series Engine 9G900 Series Engine 9H900 Series Engine 10E900 Series Engine 10F900 Series Engine 92500 Series Engine 10A902-0015-01 Engine 10A902-0016-01 Engine 10A902-0018-01 Engine 10A902-0101-01 Engine 10A902-0106-01 Engine 10A902-0107-01 Engine 10A902-0108-01 Engine 10A902-0109-01 Engine 10A902-0151-01 Engine 10A902-0156-01 Engine 10A902-0157-01 Engine 10A902-0158-01 Engine 10A902-0160-01 Engine 10A902-0161-01 Engine 10A902-0162-01 Engine 10A902-0163-01 Engine 10A902-0164-01 Engine 10A902-0164-02 Engine 10A902-0164-03 Engine 10A902-0166-01 Engine 10A902-0168-01 Engine 10A902-0171-01 Engine 10A902-0172-01 Engine 10A902-0175-01 Engine 10A902-0178-01 Engine 10A902-0179-01 Engine 10A902-0180-01 Engine 10A902-0181-01 Engine 10A902-0181-02 Engine 10A902-0181-03 Engine 10A902-0182-01 Engine 10A902-0182-02 Engine 10A902-0182-03 Engine 10A902-0183-01 Engine 10A902-0184-01 Engine 10A902-0187-01 Engine 10A902-0188-01 Engine 10A902-0189-01 Engine 10A902-0190-01 Engine 10A902-0192-01 Engine 10A902-0194-01 Engine 10A902-0195-01 Engine 10A902-0196-01 Engine 10A902-0196-02 Engine 10A902-0198-01 Engine 10A902-0203-01 Engine 10A902-0204-01 Engine 10A902-0205-01 Engine 10A902-0207-01 Engine 10A902-0208-01 Engine 10A902-0212-01 Engine 10A902-0213-01 Engine 10A902-0215-01 Engine 10A902-0217-01 Engine 10A902-0221-01 Engine 10A902-0222-01 Engine 10A902-0223-01 Engine 10A902-0224-01 Engine 10A902-0226-01 Engine 10A902-0227-01 Engine 10A902-0228-01 Engine 10A902-0229-01 Engine 10A902-0232-01 Engine 10A902-0233-01 Engine 10A902-0235-01 Engine 10A902-0236-81 Engine 10A902-0239-01 Engine 10A902-0240-01 Engine 10A902-0241-01 Engine 10A902-0242-01 Engine 10A902-0242-02 Engine 10A902-0244-01 Engine 10A902-0245-01 Engine 10A902-0246-01 Engine 10A902-0248-02 Engine 10A902-0250-81 Engine 10A902-0423-A1 Engine 10A902-0426-A1 Engine 10A902-0439-A3 Engine 10A902-0471-A1 Engine 10A902-0478-A1 Engine 10A902-0479-A1 Engine 10A902-0483-A1 Engine 10A902-0505-01 Engine 10A902-0506-01 Engine 10A902-0615-A1 Engine 10A902-0616-A1 Engine 10A902-0618-A1 Engine 10A902-1020-81 Engine 10A902-1021-81 Engine 10A902-1022-81 Engine 10A902-1023-01 Engine 10A902-1024-01 Engine 10A902-1025-81 Engine 10A902-1026-81 Engine 10A902-1028-81 Engine 10A902-1605-B1 Engine 10A902-1605-E1 Engine 10A902-1615-B1 Engine 10A902-1615-E1 Engine 10A902-1616-B1 Engine 10A902-1616-E1 Engine 10A902-1618-B1 Engine 10A902-1618-E1 Engine 10A902-2001-B1 Engine 10A902-2001-E1 Engine 10A902-2003-B1 Engine 10A902-2004-B1 Engine 10A902-2005-B1 Engine 10A902-2007-B1 Engine 10A902-2008-B1 Engine 10A902-2010-B1 Engine 10A902-2011-B1 Engine 10A902-2017-E1 Engine 10A902-2027-B1 Engine 10A902-2028-B1 Engine 10A902-2028-B2 Engine 10A902-2029-B1 Engine 10A902-2031-B1 Engine 10A902-2032-B1 Engine 10A902-2033-B1 Engine 10A902-2034-B1 Engine 10A902-2035-B1 Engine 10A902-2040-B1 Engine 10A902-2040-E1 Engine 10A902-2050-B1 Engine 10A902-2052-B1 Engine 10A902-2064-B1 Engine 10A902-2064-E1 Engine 10A902-2070-B1 Engine Toro 16410 (3900001-3999999)(1993) Lawn Mower 16411 (3900001-3999999)(1993) Lawn Mower 20180 (2000001-2999999)(1992) Lawn Mower 20181 (3900001-3999999)(1993) Lawn Mower 20181 (4900001-4999999)(1994) Lawn Mower 20181 (5900001-5999999)(1995) Lawn Mower 20181 (6900001-6999999)(1996) Lawn Mower 20181 (7900001-7999999)(1997) Lawn Mower 20181WF (3900001-3999999)(1993) Lawn Mower 20182 (39000001-39999999)(1993) Lawn Mower 20431 (39000001-39999999)(1993) Lawn Mower 20432 (39000001-39999999)(1993) Lawn Mower Package includes one 2-pack air filters only. All other parts, hardware and accessories sold separately. Thank you for shopping Lawnmowerpartsworld!