The Outerwears ATV Pre-Filter is designed for use with the K&N YA-4350 air filter, helping provide an additional layer of protection against dust, dirt, sand, and other debris. Part number 20-1009-01 is made for powersports applications where maintaining clean incoming air is important for reliable engine performance and air-filter service life.
Fitment: This pre-filter fits select Yamaha ATV models, including the 2002–2008 Yamaha YFM660FG Grizzly 4WD with independent rear suspension and the 1995–1997 Yamaha YFM350FX Wolverine 4WD with solid rear axle. Verify the air-filter model and vehicle application before installation to ensure proper compatibility.
Designed as a protective cover for the compatible K&N filter, this Outerwears product is suitable for off-road riding conditions that can expose an ATV air-intake system to heavy airborne contaminants. Its application-specific design supports a secure fit over the corresponding filter and can help reduce the amount of larger debris reaching the primary filter element.
Install the pre-filter over a clean, properly seated K&N YA-4350 air filter and follow the air-filter manufacturer’s cleaning and maintenance recommendations. The Outerwears brand and manufacturer part number 20-1009-01 provide a direct reference for replacement and fitment verification.
Features:
- Application: ATV pre-filter designed for use with the K&N YA-4350 air filter
- Brand: Outerwears
- Manufacturer Part Number: 20-1009-01
- Protection: Helps shield the primary air filter from dust, dirt, sand, and off-road debris
- Fitment: 2002–2008 Yamaha YFM660FG Grizzly 4WD with IRS
- Fitment: 1995–1997 Yamaha YFM350FX Wolverine 4WD with SRA
- Installation: Fits over the compatible air filter for added intake protection
Fitment:
1987 Yamaha YFM350X Warrior
1988 Yamaha YFM350X Warrior
1989 Yamaha YFM350X Warrior
1990 Yamaha YFM350X Warrior
1991 Yamaha YFM350X Warrior
1992 Yamaha YFM350X Warrior
1993 Yamaha YFM350X Warrior
1994 Yamaha YFM350X Warrior
1995 Yamaha YFM350FX Wolverine 4WD [SRA]
1995 Yamaha YFM350X Warrior
1996 Yamaha YFM350FX Wolverine 4WD [SRA]
1996 Yamaha YFM350X Warrior
1997 Yamaha YFM350FX Wolverine 4WD [SRA]
1997 Yamaha YFM350X Warrior
1998 Yamaha YFM350FX Wolverine 4WD [SRA]
1998 Yamaha YFM350X Warrior
1998 Yamaha YFM600FG Grizzly 4WD [SRA]
1999 Yamaha YFM350FX Wolverine 4WD [SRA]
1999 Yamaha YFM350X Warrior
1999 Yamaha YFM600FG Grizzly 4WD [SRA]
2000 Yamaha YFM350FX Wolverine 4WD [SRA]
2000 Yamaha YFM350X Warrior
2000 Yamaha YFM600FG Grizzly 4WD [SRA]
2001 Yamaha YFM350FX Wolverine 4WD [SRA]
2001 Yamaha YFM350X Warrior
2001 Yamaha YFM600FG Grizzly 4WD [SRA]
2002 Yamaha YFM350FX Wolverine 4WD [SRA]
2002 Yamaha YFM350X Warrior
2002 Yamaha YFM660FG Grizzly 4WD [IRS]
2003 Yamaha YFM350FX Wolverine 4WD [SRA]
2003 Yamaha YFM350X Warrior
2003 Yamaha YFM660FG Grizzly 4WD [IRS]
2004 Yamaha YFM350FX Wolverine 4WD [SRA]
2004 Yamaha YFM350R Raptor
2004 Yamaha YFM350X Warrior
2004 Yamaha YFM660FG Grizzly 4WD [IRS]
2005 Yamaha YFM350FX Wolverine 4WD [SRA]
2005 Yamaha YFM350R Raptor
2005 Yamaha YFM660FG Grizzly 4WD [IRS]
2006 Yamaha YFM350R Raptor
2006 Yamaha YFM660FG Grizzly 4WD [IRS]
2007 Yamaha YFM350R Raptor
2007 Yamaha YFM660FG Grizzly 4WD [IRS]
2008 Yamaha YFM660FG Grizzly 4WD [IRS]