K&N RU-4690 | Air Filter

Part Number
Universal Clamp-On Air Filter

Fits: 91-01 Jeep Cherokee, 92-95 BMW 325i, 92-95 BMW 325is, 93-98 Jeep Grand Cherokee, 95-99 BMW M3, 96-99 BMW 328i, 96-99 BMW 328is, 98-99 BMW 323is

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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 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.



  • Universal Clamp-On Air Filter
  • Regardless of the angle or offset diameter of an air intake| there is probably a K/N Universal air filter for your equipment. K/N universal air filters are washable and reusable.
  • One Year Limited Warranty
  • High Air Flow With Excellent Filtration
  • Malleable Flanges
  • Clamp-On Washable and Reusable Air Filter
  • Designed To Increase Horsepower And Acceleration
  • Universal Clamp-on Air Filter


Air Filter Large End Diameter5.000 in. (127mm)
Automotive Item GradeHigh Performance
Base Outside Diameter5.000 in. (127mm)
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.66 oz (49 ml)
Flange Angle0 Degree
Flange Inside Diameter3.000 in. (76mm)
Flange Length1.25 in. (32mm)
Flange Offset0.000 in. (0mm)
Flange TypeCentered
Frame DesignFlexible
Item Height7.875 in. (200mm)
Item Weight1.400 lbs. (0.6 kg)
Machine WashableYes
Number of Flanges1
Oil IncludedFilter Is Pre-Oiled
Package Contents1 Air Filter
Package MaterialCorrugated
Package Quantity1
Package TypeBox
Prop 65 (C, R or CR)CR
Prop 65 Warning Labelhttps://www.knfilters.com/images/l/prop65.jpg
ShapeRound Tapered
TitleK&N RU-4690 Universal Clamp-On Air Filter
Top MaterialRubber
Top Outside Diameter4.000 in. (102mm)
Top StyleRubber
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Round Tapered| Base OD-6.5 in.| Top OD-4.5 in.| Flange ID-4 in./L-1.75 in.| H-6 in.| W-1.6 lbs.| Centered| Rubber


  • 1995-1999 BMW M3
  • 1996-1999 BMW 328i
  • 1993-1998 Jeep Grand Cherokee
  • 1991-2001 Jeep Cherokee
  • 1992-1995 BMW 325is
  • 1992-1995 BMW 325i
  • 1996-1999 BMW 328is
  • 1998-1999 BMW 323is
Customer Questions
Can K&N filters get wet?
No, K&N filters should not get wet.
When to clean K&N air filter?
K&N air filters should be cleaned approximately every 50,000 miles (80,000 kilometers) or as recommended by the manufacturer.
Will K&N filter increase mpg?
It is possible for a K&N air filter to slightly improve fuel efficiency (MPG) under certain conditions.
What does K&N mean?
K&N stands for the names of the two founders of the company, Ken Johnson and Norm McDonald.
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