K&N RU-3550 Universal Clamp-On Air Filter
Highlights
- Filters Incoming Air
- Stretches to Fit Middle Sizes
- Washable and Reusable
- Made in the USA
K&N RU-3550 Universal Clamp-On Air Filter
Filter harmful particles out of incoming air with a K&N Universal Clamp-On Air Filter. These filters feature ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. They can also be stretched for up to 1/16” (1.5mm) to fit in-between sizes. These K&N universal air filters are washable, reusable, and made in the USA!
Features and Benefits:
- Filters incoming air
- Stretch up to 1/16” to fit in-between sizes
- Washable and Reusable
- Made in the USA
Specifications:
- Package Contents: 1 Air Filter, 1 K&N 1/2oz Filter Oil
- Air Filter Material: Cotton Gauze
- Package Quantity: 1
- Washable: Yes
- Flange Type: Centered
- Flange Inside Diameter: 3.5 in (89 mm)
- Air Filter Shape: Round Tapered
- Top Material: None
- Top Style: Rubber
- Top Outside Diameter: 3.5 in (89 mm)
- Height: 5.5 in (140 mm)
- Flange Length: 0.625 in (16 mm)
- Flanges: 1
- Base Outside Diameter: 4.625 in (117 mm)
- Air Filter Large End Diameter: 4.625 in (117 mm)
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Engine, Mustang Air Cleaners & Filters, Mustang Air Filters, Ford Focus ST Parts

Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following C/K years:
- 1988,
- 1989,
- 1990,
- 1991,
- 1992,
- 1993,
- 1994,
- 1995,
- 1996,
- 1997,
- 1998,
This product will fit the following C10 years:
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
- 1980,
- 1981,
- 1982,
- 1983,
- 1984,
- 1985,
- 1986,
- 1987,
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following F-150 years:
This product will fit the following Focus years:
This product will fit the following Mustang years:
- 1964.5,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
- 1980,
- 1981,
- 1982,
- 1983,
- 1984,
- 1985,
- 1986,
- 1987,
- 1988,
- 1989,
- 1990,
- 1991,
- 1992,
- 1993,
- 1994,
- 1995,
- 1996,
- 1997,
- 1998,
- 1999,
- 2000,
- 2001,
- 2002,
- 2003,
- 2004,
- 2005,
- 2006,
- 2007,
- 2008,
- 2009,
- 2010,
- 2011,
- 2012,
- 2013,
- 2014,
- 2015,
- 2016,
- 2017,
- 2018,
- 2019,
- 2020,
- 2021,
- 2022,
- 2023,
- 2024,
- 2025,