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K&N RC-4780

Universal Air Filters > Universal Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   15 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" (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 Large End Diameter6.625 in (168 mm)
Air Filter ShapeRound Tapered
Base Outside Diameter6.625 in (168 mm)
Filter MaterialCotton Gauze
Filter Re-Oiling Amount6.79 oz (201 ml)
Flange Inside Diameter4 in (102 mm)
Flange Length1.688 in (43 mm)
Flange TypeCentered
Footnote 1Base Has (2) 7/8" Vents
Footnote 2Base Has Opt. 1/2" Vent
Footnote 3Base Has 23/32 Vent
Height9.5 in (241 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height7.75 in (197 mm)
Product Box Length14.38 in (365 mm)
Product Box Width7.38 in (187 mm)
Product StyleRound Tapered Universal Air Filter
Top Material/FinishBlack Powder Coated
Top Outside Diameter5.25 in (133 mm)
Top StyleMetal
Weight3.3 lb (1.5 kg)

K&N RC-4780 Product Reviews

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Review part RC-4780
Friday, January 22, 2016 - Part RC-4780
Have used K&N for several years just ordered these to replace old filters. I have not used the sock as of now.

Tuesday, December 15, 2015 - Part RC-4780
Made my turbo sound awesome, for the cold air intake.

Tuesday, November 03, 2015 - Part RC-4780
I ordered an extra filter to keep a rotation going in my truck so that I can always have a clean filter ready to go. The replacement filter was easy to install in about 5 minutes. I noticed an immediate improvement in performance in my truck

Tuesday, June 23, 2015 - Part RC-4780
I used to have an auto accessories store years ago and have used most all the products on the market. The quality, fit and finish has always been outstanding and performance superior to the rest. I just recently purchased 2 FIPK systems for my girlfriends car and another car I bought. Quality is second to none. David H.

David H
Puyallup, Washington
Tuesday, May 19, 2015 - Part RC-4780
It was very easy to install...less than 10 minutes. It seems to be working well and the price was right. Thank you.

Pleasanton, Texas
Monday, May 18, 2015 - Part RC-4780
Great product. I have been using K&N products for years and remain very satisfied. The plus on this order was how quickly and efficiently K&N shipped it to my house in Alaska.

Anchorge, Alaska
Wednesday, May 13, 2015 - Part RC-4780
Excellent product almost instant delivery. I can't wait for my hat to show up.

Los Angeles, California