Arlen Ness
Arlen Ness, Stage 1 Big Sucker air cleaner kit. OEM cover
Arlen Ness, Stage 1 Big Sucker air cleaner kit. OEM cover
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Plain backing plate. For use with OEM air cleaner cover. Designed to pull in the most air possible under the factory air cleaner cover. The backing plate features a patent-pending hidden breather system and a formed aluminum internal design resulting in more performance with no oil blow-bye issues. The integrated patent-pending oil catch makes sure no oil ever touches the massive perimeter-flow air filter. - Increases Horsepower & Torque - Eliminates Oil Blow-bye Issues Associated with M8 Engines- Red Pre-Oiled High Performance Filter - Patented Oil Catch / Reservoir - Patented Hidden Breather Backing Plate - Aluminum Filter Top Plate Design Eliminates Internal Mounting Hardware - Specially Formed Radius Air Inlet & Air Venturi
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp seven days a week.