The OUTERWEARS ATV Pre-Filter is designed for use with K&N YA-4350 air filters and helps provide an additional layer of protection for off-road engines. Its red filter cover helps shield the primary air filter from dust, dirt, sand, and moisture while supporting consistent airflow during demanding trail and utility riding.
Manufactured by OUTERWEARS, this pre-filter is identified by manufacturer part number 20-1009-03 and vendor part number 25-5878R. The cover is designed for a precise fit over the compatible K&N air filter, helping extend service intervals and reduce the amount of debris that reaches the main filter element. It is a practical replacement or upgrade for riders who frequently operate in dusty or wet conditions.
Fitment includes 2002–2008 Yamaha YFM660FG Grizzly 4WD models equipped with IRS, as well as 1995–1997 Yamaha YFM350FX Wolverine 4WD models equipped with SRA. Verify the existing air filter model and vehicle application before installation to ensure compatibility. The OUTERWEARS pre-filter installs over the air filter and should be cleaned and maintained according to the manufacturer’s recommendations.
Features:
- Brand: OUTERWEARS
- Product Type: ATV air filter pre-filter
- Color: Red
- Compatible Air Filter: K&N YA-4350
- Manufacturer Part Number: 20-1009-03
- Vendor Part Number: 25-5878R
- Protection: Helps shield the primary air filter from dust, dirt, sand, and moisture
- Fitment: 2002–2008 Yamaha YFM660FG Grizzly 4WD with IRS
- Fitment: 1995–1997 Yamaha YFM350FX Wolverine 4WD with SRA
- Application: Off-road ATV and utility riding
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]