Twin Air 160600 Fuel Tank Filter Fits: Honda CRF 250 2010-2013; CRF 450 2009-2013 Twin Air's latest product features a custom shaped adaptor for each model that fits securely under the gas cap, creating a leak-proof seal The filter media traps dirt or debris that can enter into your fuel system from refueling Takes only seconds to install, easy to remove and clean Safeguards against potentially catastrophic clogging