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K&N 3.5" x 9" Air Filter Flange is no longer available
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K&N 3.5" x 9" Air Filter Flange

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16" (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.

To maintain airflow efficiency, use Recharger Filter Care Service Kit.
  • Product Style: Round Tapered Universal Air Filter
  • Base Outside Diameter: 6 in (152 mm)
  • Flange Inside Diameter: 3.5 in (89 mm)
  • Flange Length: 1.75 in (44 mm)
  • Flange Type: Centered
  • Height: 9 in (229 mm)
  • Top Outside Diameter: 4.625 in (117 mm)
  • Top Style: Rubber
  • Top Material/Finish: None
  • Filter Re-Oiling Amount: 1.92 oz (57 ml)
  • Flanges: 1
  • Inner Wire: No
  • Weight: 2 lb (0.9 kg)
  • Product Box Length: 6.38 in (162 mm)
  • Product Box Width: 6.38 in (162 mm)
  • Product Box Height: 11 in (279 mm)
Installation Notes
Installation Difficulty:
Level 1Beginner
Installation Time: Less than an hour