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K&N RC-4780 4.8 out of 5 stars 6 Customer Reviews
Universal Air Filters > Universal Air Filter

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RC-4780
 
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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" (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.

[More Information on Universal Air Filters]
  • Designed to increase horsepower and acceleration
  • Hundreds of sizes and shapes for most applications
  • High air flow with excellent filtration
  • Clamp-on washable and reusable air filter
  • Malleable flanges
  • Not legal for highway use in states adopting California emission regulations
  • One year limited warranty
Available Information
Air Filter Test Data


Product Specifications 
Air Filter Large End Diameter:6.625 in (168 mm)
Air Filter Shape:Round Tapered
Base Outside Diameter:6.625 in (168 mm)
Filter Material:Cotton Gauze
Filter Re-Oiling Amount:6.79 oz (201 ml)
Flange Inside Diameter:4 in (102 mm)
Flange Length:1.688 in (43 mm)
Flange Type:Centered
Flanges:1
Footnote 1:Base Has (2) 7/8" Vents
Footnote 2:Base Has Opt. 1/2" Vent
Footnote 3:Base Has 23/32 Vent
Height:9.5 in (241 mm)
Package Contents:1 Air Filter
Package Quantity:1
Part Number:RC-4780
Product Box Height:7.75 in (197 mm)
Product Box Length:14.38 in (365 mm)
Product Box Width:7.38 in (187 mm)
Product Style:Round Tapered Universal Air Filter
Top Material/Finish:Black Powder Coated
Top Outside Diameter:5.25 in (133 mm)
Top Style:Metal
Weight:3.3 lb (1.5 kg)


Product Reviews      Review part RC-4780

 Very fast delivery.
Jeff Harner, South Riding, Virginia
 Purchased as a replacement filter on my 5.9 Cummins. Original filter (with cleanings) logged over 300,000 miles. Here's to 300,000 more.
Mark C, Delaware
 Excellent product. Ordering was fast and easy with very quick delivery.
Terry, Grass Valley, California
 Good product and keeps the filter clean. The elastic on both ends stretches after a year or so making for a loose fit. I purchased this product as a replacement for a wrap that had lost all elasticity.
Kurt Slentz, Rapid City, South Dakota
 Upon first buying the aftermarket intake along with a turbo back exhaust, I gained almost 5 miles per gallon. I used the first filter for 10 years and only replaced it because of the dents I put in the screen. I wouldn't consider any other filter on my Dodge Diesel Truck. Thank You.
Chris Randal, Midland, Texas
 Love this filter on my truck. I bought an extra one so I can switch without having to wait after cleaning. Now I always have a clean one ready to go.
James Riley, Middleburg, Florida
 So far so good! It keeps the larger dirt and debris off the filter just like I needed it to.
Chris, Garner, North Carolina