K&N RU-3570 Universal Clamp-On Air Filter

K&N Universal Round Tapered Clamp-On Air Filter RU-5179

NEW K&N UNIVERSAL CLAMP-ON AIR FILTER P/N# RU-3570

K&N HighFlow Original Lifetime Universal ClampOn Air Filter Performance, Prem...

K&N Universal Red 6" Flange High Performance Round Tapered Clamp-On Air Filter

K&N RU-3570 Universal High Flow Clamp-On 6" Round Tapered Red Cotton Air Filter

K&N Universal Reusable 7.5" Dia Round Tapered Cotton Gauze Clamp-On Air Filter