K&N RU-5123 UNIVERSAL Clamp-On Air Filter 5-3/8"FLG, 6-3/4"OD, 5-1/8"HDescription K&N RU 5123 UNIVERSAL Clamp On Air Filter 5 3 8"FLG, 6 3 4"OD, 5 1 8"H K&N Universal Air Filters are designed and manufactured for a wide range of applications, including racing vehicles, radio controlled cars, generators, snowmobiles, tractors, and more. These filters accommodate various air intake angles and offset diameters, offering compatibility with many types of equipment. All filters feature ultra strong molded pliable rubber