Arlen Ness 81-012 Monster Sucker Air Cleaner Kit with Cover - 10-Gauge - Black fuel-air-carburetors-accessories-carburetor-accessories twist lock base is designed

twist lock base is designed to have a strong hold on glass and non-porous plastic surfaces

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2011-2013 Yamaha WR250F

Two back zippered vents

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Arlen Ness 81-012 Monster Sucker Air Cleaner Kit with Cover - 10-Gauge - Black fuel-air-carburetors-accessories-carburetor-accessories twist lock base is designedWill fit 88 90 models also; breather system is not applicable for these model years.. Monster Sucker kit features our patented Big Sucker hidden breather technology and more filter surface area for maximum performance. Hidden breathers are O ringed at the heads and exit out the mouth of the throttle body to provide efficient engine breathing, eliminating the need for any external hoses or hardware. Filter features a built in inverted top to pull in