No hassle
Live in-stock
Save over
60% retail
You have no items in your shopping cart.
June Sale: $82.99
In Stock
May ship from manufacturer
Free Shipping
Part number: RX-3820-1
Universal product
Product Details
K&N RX-3820-1 Universal X-Stream Clamp-on
Products specifications
Air Cleaner Top Style X-Stream
Air Filter Bottom Measurement 4.500 in. diameter
Air Filter Shape Round Tapered
Air Filter Style Conical
Air Filter Top Measurement 4.000 in. diameter
Base OD 4.5in(114mm)
Base Outside Diameter 4.5 in (114 mm)
Filter Color Red
Filter Material Cotton gauze
Filter Re-Oiling Amount 0.82 oz (24 ml)
Flange Angle 0 degrees
Flange Diameter 2.438in(62mm)
Flange Inside Diameter 2.438 in (62 mm)
Flange Length 0.875in(22mm)
Flange Offset 2in(51mm)in
Flange Type Centered
Flanges 1
Footnote 1 1/4-20 Jack Nut Inserted Into Filter Top
Footnote 2 Base Has 25/64" Vent
Height 6.125 in (156 mm)
Inlet Flange Inside Diameter (in) 2.438 in.
Length 6.125in(156mm)
Length (in) 6.125 in.
Package Contents 1 Air Filter
Package Quantity 1
Product Style Round Tapered Universal Air Filter
Quantity Sold individually.
Top Material/Finish None
Top OD 4in(102mm)
Top Outside Diameter 4 in (102 mm)
Air Filter Large End Diameter 4.5 in (114 mm)
Weight 1 lb (0.5 kg)

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.

  • Replaces RX-3820
  • 2-7/16"Flg, 4-1/2"B, 4"T, 6-1/8"H
Add your review
Easy checkout
All seems great.  Had item in stock as on there website and it was shipped quickly.
awesome product came in fast and very pleased with the website keep up the good work guys! thanks! high recommended.!
Show All Reviews
Return Policy
Returns are easy at THMotorsports
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy