The OUTERWEARS Pre-Filter Nu 2474ST is a water-resistant air filter cover designed to provide an additional layer of protection for compatible motorcycle air intake systems. Manufactured by OUTERWEARS, this pre-filter uses silicone-impregnated micro-mesh to help block sand, dirt, clay, and water while maintaining effective airflow. Its uniform micron-sized openings filter particles as small as 0.005 inches without noticeable air restriction.
Dyno and flow bench testing has shown no significant loss of horsepower or air intake when using this product. Dielectrically welded seams provide a secure, durable construction for demanding riding environments, helping the cover withstand exposure to dust, moisture, and debris. The Nu 2474ST design is intended to help extend service intervals for the primary air filter and support consistent engine air intake performance.
OUTERWEARS Part Number 20-1360-01 fits select 2003–2005 KTM 450 SX-F, 2003–2005 KTM 450 EXC-F, and 2003–2005 KTM 450 MXC 4-Stroke models. It also fits the 2000 Suzuki DR-Z400S. Confirm the motorcycle model and existing airbox or filter configuration before installation to ensure proper fitment.
Features:
- Water-Resistant Material: Silicone-impregnated micro-mesh helps protect the air intake from moisture and airborne debris.
- Fine Particle Filtration: Filters particles as small as 0.005 inches without noticeable airflow restriction.
- Airflow Performance: Dyno and flow bench testing showed no significant horsepower or air intake loss.
- Durable Construction: Dielectrically welded seams provide reliable strength and resistance to separation.
- Vehicle Fitment: Fits 2003–2005 KTM 450 SX-F, 2003–2005 KTM 450 EXC-F, 2003–2005 KTM 450 MXC 4-Stroke, and 2000 Suzuki DR-Z400S.
- Brand and Part Number: OUTERWEARS Nu 2474ST, manufacturer and vendor part number 20-1360-01.
Fitment:
1975 Suzuki RM125
1976 Suzuki RM125
1976 Suzuki RM250
1977 Suzuki RM125
1977 Suzuki RM250
1978 Suzuki RM125
1978 Suzuki RM250
1979 Suzuki RM125
1979 Suzuki RM250
1980 Suzuki RM125
1980 Suzuki RM250
1981 Suzuki RM125
1981 Suzuki RM250
1982 Suzuki RM125
1982 Suzuki RM250
1983 Suzuki RM125
1983 Suzuki RM250
1984 Suzuki RM125
1984 Suzuki RM250
1985 Suzuki RM125
1985 Suzuki RM250
1986 Suzuki RM125
1986 Suzuki RM250
1987 Suzuki RM125
1987 Suzuki RM250
1988 Suzuki RM125
1988 Suzuki RM250
1989 Suzuki RM125
1989 Suzuki RM250
1990 Suzuki RM125
1990 Suzuki RM250
1991 Suzuki RM125
1991 Suzuki RM250
1992 Suzuki RM125
1992 Suzuki RM250
1993 Suzuki RM125
1993 Suzuki RM250
1994 Suzuki RM125
1994 Suzuki RM250
1995 Suzuki RM125
1995 Suzuki RM250
1996 Suzuki RM125
1996 Suzuki RM250
1997 Suzuki RM125
1997 Suzuki RM250
1998 Suzuki RM125
1998 Suzuki RM250
1999 Suzuki RM125
1999 Suzuki RM250
2000 Suzuki DR-Z400
2000 Suzuki DR-Z400E Non CA Model
2000 Suzuki DR-Z400S
2000 Suzuki RM125
2000 Suzuki RM250
2001 Suzuki DR-Z400
2001 Suzuki DR-Z400E Non CA Model
2001 Suzuki DR-Z400S
2001 Suzuki RM125
2001 Suzuki RM250
2002 Suzuki DR-Z400
2002 Suzuki DR-Z400E Non CA Model
2002 Suzuki DR-Z400S
2002 Suzuki RM125
2002 Suzuki RM250
2003 KTM 450 EXC-F
2003 KTM 450 MXC 4-Stroke
2003 KTM 450 SX-F
2003 Suzuki DR-Z400
2003 Suzuki DR-Z400E Non CA Model
2003 Suzuki DR-Z400S
2003 Suzuki RM125
2003 Suzuki RM250
2004 KTM 450 EXC-F
2004 KTM 450 MXC 4-Stroke
2004 KTM 450 SX-F
2004 Suzuki DR-Z400E Non CA Model
2004 Suzuki DR-Z400S
2004 Suzuki RM125
2004 Suzuki RM250
2005 KTM 450 EXC-F
2005 KTM 450 MXC 4-Stroke
2005 KTM 450 SX-F
2005 Suzuki DR-Z400E Non CA Model
2005 Suzuki DR-Z400S
2005 Suzuki DR-Z400SM
2005 Suzuki RM125
2005 Suzuki RM250
2006 Suzuki DR-Z400E Non CA Model
2006 Suzuki DR-Z400S
2006 Suzuki DR-Z400SM
2006 Suzuki RM125
2006 Suzuki RM250
2007 Suzuki DR-Z400E Non CA Model
2007 Suzuki DR-Z400S
2007 Suzuki DR-Z400SM
2007 Suzuki RM125
2007 Suzuki RM250
2008 Suzuki DR-Z400S
2008 Suzuki DR-Z400SM
2008 Suzuki RM250
2009 Suzuki DR-Z400S
2009 Suzuki DR-Z400SM
2011 Suzuki DR-Z400S
2012 Suzuki DR-Z400S
2013 Suzuki DR-Z400S
2013 Suzuki DR-Z400SM