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K&N RC-4780 Universal Clamp-On Air Filter

Universal Air Filters > Universal Clamp-On Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   27 Customer Reviews
  • 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
  • One year limited warranty
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.

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Available Information

Product Specifications

Air Filter ShapeRound Tapered
Filter MaterialCotton Gauze
Flange Inside Diameter4 in (102 mm)
Flange Length1.688 in (43 mm)
Flange TypeCentered
Height9.5 in (241 mm)
Base Outside Diameter6.625 in (168 mm)
Top Outside Diameter5.25 in (133 mm)
Top StyleMetal
Top MaterialBlack Powder Coated
Package Contents1 Air Filter
Package Quantity1
Product StyleRound Tapered Universal Air Filter
Weight3.3 lb (1.5 kg)
Filter Re-Oiling Amount6.79 oz (201 ml)
Air Filter Large End Diameter6.625 in (168 mm)
Product Box Height7.75 in (197 mm)
Product Box Length14.38 in (365 mm)
Product Box Width7.38 in (187 mm)
Footnote 3Top Has 23/32" Center Hole

K&N RC-4780 Universal Clamp-On Air Filter Product Reviews

Monday, October 16, 2017 - Part RC-4780
Quick shipping and great price, would highly recommend.

David Bray
Fayetteville, Georgia
Thursday, October 12, 2017 - Part RC-4780
Thank you so much for addressing my issue with my K&N Air Filter. Your customer service department is fast and thorough and my issue was delt with quickly. As for installation it was a breeze. Cleaning the filter is quick and easy. I live in the high desert of California and wind is a big factor. I clean my filter every ninety days. It takes me about an hour and a half from start to finish. The drying process takes the most time as I let it dry naturally. For me this product is cost effective and I'm confident it does its job as intended. Thank you for a great product.

James Gibson
Inyokern, California
Monday, April 3, 2017 - Part RC-4780
I purchased this filter so I can replace the existing filter of the same part I can service existing filter at my own time. I am very satisfied with K&N products.

James Anderson
Tacoma, Washington
Tuesday, March 28, 2017 - Part RC-4780
You have a great product and I have been using the K&N filters for years/decades. Awesome! Thanks for the great service. Mark

Mark Behne
Highland, California
Tuesday, February 14, 2017 - Part RC-4780

Shawn Bennett
DeRidder, Louisiana
Monday, November 21, 2016 - Part RC-4780
Shipping was fast and on time. Had my filter for 150,000 miles on my Dodge diesel and the rubber around the neck got hard, made it hard to take off and on. So I got a new one. Love it...

William Smith
Vail, Arizona
Saturday, October 29, 2016 - Part RC-4780
I was surprised at how fast I got my order. It helps with the fuel mileage and HP.

James Stokes
Beggs, Kansas