RFX Air Filter FXAF 50004 55NO for KTM 250 SX, 450 SX-F and 85 SX

New to the RFX range and produced by Multi Air, the RFX Air filter is the perfect choice for all levels. Let your bike breath with twin layered foam and precise fitment. With over 30 Years experience, Multi Air is a name you can trust.

The RFX Air Filter, model FXAF 50004 55NO, is manufactured by Multi Air for RFX and provides dependable filtration for select KTM motocross motorcycles. Designed as a direct-fit replacement, this twin-layer foam filter helps protect the engine from dirt, dust, and airborne debris while supporting consistent airflow during riding and competition.

Built with breathable, twin-layer foam, the RFX filter balances filtration performance and air delivery. Nonflammable foam is used for all four-stroke applications, providing an added level of material suitability for demanding off-road use. With more than 30 years of filter manufacturing experience, Multi Air produces filtration components designed for reliable fitment and service.

Fitment includes 2004–2006 KTM 250 SX models, the 2006 KTM 250 SX-F, 2004–2006 KTM 450 SX-F models, and 2004–2006 KTM 85 SX motorcycles equipped with 17/14-inch wheels. Verify the motorcycle model and year before installation. The manufacturer is Multi Air, the vendor is RFX, and the vendor part number is FXAF 50004 55NO.

Features:

• Brand: RFX
• Manufacturer: Multi Air
• Vendor Part Number: FXAF 50004 55NO
• Model: FXAF 50004 55NO
• Filter Type: Breathable twin-layer foam air filter
• Material: Nonflammable foam for four-stroke applications
• Fitment: 2004–2006 KTM 250 SX
• Fitment: 2006 KTM 250 SX-F
• Fitment: 2004–2006 KTM 450 SX-F
• Fitment: 2004–2006 KTM 85 SX with 17/14-inch wheels

Fitment:
2004 KTM 125 SX
2004 KTM 200 Exc
2004 KTM 200 Sx
2004 KTM 250 EXC
2004 KTM 250 SX
2004 KTM 300 EXC
2004 KTM 450 EXC-F
2004 KTM 450 SX-F
2004 KTM 525 EXC 4-Stroke
2004 KTM 85 SX (17/14)
2005 KTM 125 SX
2005 KTM 200 Exc
2005 KTM 200 Sx
2005 KTM 250 EXC
2005 KTM 250 SX
2005 KTM 300 EXC
2005 KTM 450 EXC-F
2005 KTM 450 SX-F
2005 KTM 525 EXC 4-Stroke
2005 KTM 85 SX (17/14)
2006 KTM 125 SX
2006 KTM 200 Exc
2006 KTM 200 Sx
2006 KTM 250 SX
2006 KTM 250 SX-F
2006 KTM 300 EXC
2006 KTM 450 EXC-F
2006 KTM 450 SX-F
2006 KTM 525 EXC 4-Stroke
2006 KTM 85 SX (17/14)
2007 KTM 144 Sx
2007 KTM 200 Exc
2007 KTM 300 EXC
2007 KTM 450 EXC-F
2007 KTM 525 EXC 4-Stroke
2007 KTM 85 SX (17/14)
2008 KTM 144 Sx
2008 KTM 85 SX (17/14)
2009 KTM 85 SX (17/14)
2010 KTM 85 SX (17/14)
2011 KTM 85 SX (17/14)
2012 KTM 85 SX (17/14)