Manufactured with the worlds highest quality materials. Over 95 years of experience. Test results prove 28% longer service life than OE and leading competitor brands. Lower cost with higher quality when compared to OE filter. This item fits H-D the following vehicle applications: fits KTM™ 250 EXC 4-Stroke 2003-2005 fits KTM™ 400 EXC 2000-2006 fits KTM™ 400 MXC 2001-2002 fits KTM™ 400 SX 1999-2002 fits KTM™ 400 SXC 1997-2000 fits KTM™ 450 EXC 2003-2005 fits KTM™ 450 MXC 2003-2005 fits KTM™ 450 SMR 2005-2006 fits KTM™ 450 SX-F 2003-2006 fits KTM™ 450 XC 2008-2010 fits KTM™ 450 XC-F 2006 fits KTM™ 450 XC-W 2006 fits KTM™ 520 EXC 2000-2002 fits KTM™ 520 MXC 2000-2002 fits KTM™ 520 SX 2000-2002 fits KTM™ 525 EXC 2003-2006 fits KTM™ 525 MXC 2003-2005 fits KTM™ 525 SX 2003-2006 fits KTM™ 525 XC 2008-2010 fits KTM™ 540 SXC 2000-2006 fits KTM™ 625 SMC 2004-2005 fits KTM™ 625 SXC 2003-2004 fits KTM™ 690 Duke 2011 fits KTM™ 690 Duke 2010-2011 fits KTM™ 690 Duke 2009-2010 fits KTM™ 690 Duke 2008 fits KTM™ 690 Duke 2008-2009 fits KTM™ 690 Enduro 2008 fits KTM™ 690 Enduro R 2009-2010 fits KTM™ 690 SMC 2008-2010 fits KTM™ 690 Supermoto 2008 fits POL Outlaw 450 MXR 2008-2009 fits POL Outlaw 525 IRS 2007-2011 fits POL Outlaw 525 S 2008-2010