DNA KTM EXC 400, SX 400 and MXC 400 motorcycle air filter adds horsepower while letting your dirtbike breathe better. The efficiency of DNA Filters maximizes breathable surface area compared to the OEM filter allowing you to get the most horsepower with 99% clean air filtration.Equivalent to KTM OEM: 51206015000/ 54806016000/ 59006015000 TECHNICAL FEATURES Features DNA's advanced FCd (Full Contour design) DNA Fcd air filter flow: CFM (Cubic feet per minute) @1,5" H2O corrected @ 25 degrees Celsius The DNA filter has a substantially higher airflow than the stock paper filter! Extremely high filtering efficiency of 98-99%, with 4 layers of DNA Next Generation Premium Cotton These air filters are washable and resusable Drop-In Hassle Free Installation (simply follow the information in the workshop manual) Lifetime Warranty FITS KTM EXC 400 (2000-2005) KTM EXC-G 400 (2002-2006) KTM MXC 400 (2001-2002) KTM SX 400 (2000-2002) KTM XC-W 400 (2007)