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 finish one-piece aluminum backing plate. - Used with OEM air cleaner cover with single central bolt (excl. 08-17 Dyna; see note). - Can be used as an exposed filter design when using one of the Ness Stage1 billet covers - Increases horsepower & torque - Built-in patented breathing system features hidden channels to prevent the use of unsightly exposed breather hoses and fittings - Radius air inlet for unobstructed airflow Note: 08-17 Dyna will require a custom outer air cleaner cover with a minimum inner diameter of 6-1/4".
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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.