Hiflofiltro has been manufacturing filters for the OEM motor industry since 1963. With the experience of more than four decades, constant research and development and modern production facilities they manufacture today some of the best quality filters in the world. Hiflofiltro is the complete range of motorcycle filters engineered to extreme quality standards to provide ultimate engine protection.Hiflofiltro OE Replacement Off-Road / Competition Dual Stage Air Filters: -Manufactured Using a special dual layer foamFoam formulated to maximize filtration with optimum air flow for improved powerManufactured to fit factory air boxUltimate FiltrationMaximum PowerCan be used over and over againEasily cleanedDual-Stage Racing Foam Air Filters Competition off-road air filters manufactured in the Netherlands using a special dual-layer foam, formulated for maximum filtration and optimum air flow for improved power. Top quality materials and superior construction allow the filter to be used over and over again without any loss of performance.