K&N RU-1550 | Air Cleaner Assembly

Part Number
Universal Clamp-On Air Filter
Special Price $63.74 Regular Price $74.99
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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.



  • High Air Flow With Excellent Filtration
  • Designed To Increase Horsepower And Acceleration
  • 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
  • Clamp-On Washable and Reusable Air Filter
  • Universal Clamp-on Air Filter
  • Malleable Flanges


Automotive Item GradeHigh Performance
Base Outside Length6.250 in. (159mm)
Base Outside Width4.000 in. (102mm)
CARB/Air Horn Diameter2.750 in.
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.36 oz (40 ml)
Flange Angle10 Degree
Flange Inside Diameter2.750 in. (70mm)
Flange Length1.000 in. (25mm)
Flange Offset0.000 in. (0mm)
Flange TypeAngled
Flange/Bore Center to Center0.000 in. (0mm)
Frame DesignFlexible
Inner WireNo
Item Height7.000 in. (178mm)
Item Weight1.500 lbs. (0.7 kg)
Machine WashableYes
MaterialRubber Base
Number of Flanges1
Oil IncludedFilter Is Pre-Oiled
Outside Length6.25 in. (159mm)
Outside Width4.000 in. (102mm)
Package Content1
Package Contents1 Air Filter
Package MaterialPaperboard
Package Quantity1
Package TypeBox
Product Box Height11.000 in. (279mm)
Product Box Length6.380 in. (162mm)
Product Box Width6.380 in. (162mm)
Prop 65 (C, R or CR)CR
Prop 65 Warning Labelhttps://www.knfilters.com/images/l/prop65.jpg
TitleK&N RU-1550 Universal Clamp-On Air Filter
Top MaterialNone
Top Outside Length6.250 in. (159mm)
Top Outside Width4.000 in. (102mm)
Top StyleRubber
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov


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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