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K&N RX-3820-1

K&N Round Straight X-Stream Clamp-On Air Filter


Estimated to ship directly from the manufacturer on 12/24/18

K&N Round Straight X-Stream Clamp-On Air Filter $82.99
Out of stock
Round Straight X-Stream Air Filter
  • Flange Inside Diameter: 2.438" (62 mm)
  • Flange Length: 0.875" (22 mm)
  • Flange Type: Centered
  • Height: 6.125" (156 mm)
  • Base Outside Diameter: 4.5" (114 mm)
  • Top Outside Diameter: 4" (102 mm)
  • K&N RX-3820-1 Details

    2.438'' (62 mm) Flange Diameter

    • Pleated filter built in top
    • Washable and reusable
    • Low restriction
    • Clamp-on design


    Flange Type
    Overall Length (in.)
    Top Style
    Filter Re-Oiling Amount
    0.82 oz (24 ml)
    Top Material/Finish
    Air Filter Large End Diameter
    4.5 in (114 mm)
    Flange Offset
    0 in (0 mm)
    Top Outside Diameter
    4 in (102 mm)
    Air Filter Bottom Measurement (in.)
    4.500 diameter
    Air Filter Style
    Air Filter Top Measurement (in.)
    4.000 diameter
    Inlet Flange Inside Diameter (in.)
    Sold individually
    Flange Angle (Deg)
    Package Contents
    1 Air Filter
    Package Quantity
    Air Filter Shape
    Round Tapered
    Base Outside Diameter
    4.5 in (114 mm)
    Product Style
    Round Tapered Universal Air Filter
    Flange Inside Diameter
    2.438 in (62 mm)
    Weight (lbs.)
    1 lb (0.5 kg)
    6.125 in (156 mm)
    Flange Length
    0.875 in (22 mm)
    Footnote 1
    1/4-20 Jack Nut Into Top
    Footnote 2
    Base Has 25/64" Vent
    Manufacturer's Part Number:

    Long-Term Durable Performance

    K&N Tapered Universal Filters are the best quality and performance air filter option for your vehicle. With an inverted cone design, these clamp-on tapered air filters will direct high levels of airflow to the throttle body to increase your engine's horsepower and torque. Each filter is washable and reusable, making them an affordable choice.

    Whether you are building your own cold air induction kit or you have an application that is just a little different, K&N has many of the sizes and styles to fit your performance needs.

    Sold individually, unless otherwise noted.


    • K&N Quality and Performance
    • Several Sizes and Styles to Fit Your Needs
    • Clean and Re-oil Instead of Replacing
    • Rubber Flanges Absorb Vibration


    Items You Need

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.