Twin Air 160640 Fuel Tank Filter Fits: KTM 250/350/450 2011-2012 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