K&N Round High-Flow Air Filter for Air Box Removal Kit

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The K&N Round Filter helps boost performance by opening up the intake system, increasing air flow into the engine and allowing it to run more efficiently. The retro round style add s a vintage touch to any Triumph Classic or Cruiser. K&N Rounds Filters fit perfectly with British Customs Air Box removal kit. All K&N Filters are washable and reusable. Dimensions: Air Filter (I.D.): 2-1/8" (54mm) Injector (I.D.): 2-1/16" (52.5mm) Air Filter Diameter: 3-1/2x 5 Note: These are not stock replacements filters. You must remove your air box prior to installation. Show more