Twin Air Flame-Retardant Backfire Filter Pre-Oiled Air Filter 154222FRX fits 2021-2023 Gas Gas EX250 F, EX350 F, MC250 F, MC450 F / 2019-2022 Husqvarna FC250, FC350, FC450, FE350, FX350, FX450 / 2019 Husqvarna FE250, FE450 / 2019-2023 Husqvarna FS450

Pre-oiled with Twin Air BIO Foam Filter Oil using state of the art filter oiling machines, which provide ultimate consistency in pore coverageReplacement backfire resistant air filters for Twin Air Airbox Kits (sold separately)Fused, dual layer backfire resistant offroad air filter for four stroke Yamaha YZ/WR dirt bikesCoarse, open pore outer foam catches airborne dirt, grime and sand before they can damage your engineFree flowing, backfire resistant foam laminated to the inside of the air filter eliminates restrictive, stock backfire screenFine pore inner foam designed for 4-stroke engines acts as a second filter to trap the smallest particles, while ensuring maximum air passageThick, flat foam greaseless sealing ring ensures maximum contact with your airbox, while acting as a breathable gasket for increased air passageFused inner and outer elements prevent dirt and grime from being lodged between layersWashable/reusable design for enhanced cost effectiveness, reusing a Twin Air foam air filter 40-50 times is commonExclusively formulated adhesive withstands repeated cleanings, even with harsh solvents or gasolineSlightly smaller than stock filters to increase air space around the filter and improve circulationHigh quality construction, assembled by hand and inspected for a perfect fitEvenly sized and distributed cell pores for even coating of air filter oilGreen BIO Liquid Power air filter oil micro-coats the foam cell walls and prevents dirt, dust, mud and even water from entering your carburetorBoost your vehicle's performance with the first biodegradable air filter oil that works in all riding conditions, with the added convenience of wash down the drain cleaningPackaged in a resealable bag for added convenience