You’d be amazed at the dirt and debris that can end up in your fuel carrier and then into your fuel tank. Twin Air’s monofilament screen pocket inserts into your fuel tank and catches the particles as small as 40 microns (.00165”) while allowing the gas to flow freely. The flange is custom-sized for each modern 4-stroke model to ensure a leak-proof seal. Just remove the filter periodically, turn inside out, and clean the debris that could have been in your engine. Twin Air Fuel Filter to fit Honda CRF250R 10-17 CRF450R 09-16 CRF450RX 17-22 TRX450R 08-14 ATV SUZUKI RM-Z450 18-22 Also fits, IMS Tanks