DNA Honda RC51 air filters add horsepower while letting your sportbike breathe better. The efficiency of DNA Filters maximizes breathable surface area compared to the OEM filters allowing you to get the most horsepower on any track day event. *Includes both Left and Right side filters.Equivalent to Honda OEM: 17235MCF000 TECHNICAL FEATURES Features DNA's advanced FCd (Full Contour design) Extremely high filtering efficiency of 98-99%, with 4 layers of DNA Next Generation Premium Cotton These air filters are washable and reusable Drop-In Hassle Free Installation (simply follow the information in the workshop manual) Lifetime Warranty FITS Honda RC51 (2000-2006)