K&N RU-5111 Performance Air Filter


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K&N Universal Air Filters

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.

  • Designed to increase horsepower and acceleration
  • Hundreds of sizes and shapes for most applications
  • High air flow with excellent filtration
  • Clamp-on washable and reusable air filter
  • Pliable flanges absorb vibration and can be stretched up to 1/16 In. to fit in-between sizes
  • Not legal for highway use in states adopting California emission regulations
  • One year limited warranty




RU-5111 Specification

  • Part Number: RU-5111
  • Product Style: Round Tapered Universal Air Filter
  • Air Filter Shape: Round Tapered
  • Air Filter Large End Diameter: 4.5 in (114 mm)
  • Base Outside Diameter: 4.5 in (114 mm)
  • Top Outside Diameter: 3.5 in (89 mm)
  • Flanges: 1
  • Flange Inside Diameter: 3 in (76 mm)
  • Flange Length: 0.75 in (19 mm)
  • Flange Type: Centered
  • Height: 5.75 in (146 mm)
  • Filter Material: Cotton Gauze
  • Top Style: Rubber
  • Top Material/Finish: None
  • Package Contents: 1 Air Filter
  • Package Quantity: 1
  • Filter Re-Oiling Amount: 0.6 oz (18 ml)
  • Weight: 0.8 lb (0.36 kg)
  • Product Box Length: 5.63 in (143 mm)
  • Product Box Width: 4.63 in (117 mm)
  • Product Box Height: 9.25 in (235 mm)



K&N Million Mile Limited Warranty®

'K&N warrants its street vehicle OE Replacement Air Filters for one million miles. When used properly and found to be defective, return your filter and the receipt from purchase and K&N will replace it free of charge.'

-Source: K&N's Official Website

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