K&N Clamp-On Air Filter Suzuki Yamaha Features K&N filters can increase horsepower up to 12 Clamp-on style is designed for all racing motorcycles Dual flange inlet Allows considerably more air flow than stock air box set-up Carburetor adjustment will be required usually a 25 increase in jet sizes can be expected Air filter shape oval Base outside length 6.25 in (159 mm) Base outside width 3.75 in (95 mm) Filter material cotton gauze Flange center to center 3 in (76 mm) Flange inside diameter 2.375 in (60 mm) Flange length 0.375 in (10 mm) Flange type centered Flanges 2 Height 3 in (76 mm) Outside length 6.25 in (159 mm) Outside width 3.75 in (95 mm) Package contents 2 air filters