$58.99 USD
MSRP $90.99 35.2% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

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   18 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.

[More Information on Universal Air Filters]

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

Monday, May 23, 2016 - Part RC-4780
Ordered it as replacement. The other had 165,000 miles on it. Was just as promised.

Larry Oliver
Bryan, Texas
Tuesday, April 5, 2016 - Part RC-4780
Been using K&N filters for 20 years and have great results and it saves us a lot of money here at Older Than Dirt Motorsports.

Craig Leitzel
Tuesday, February 23, 2016 - Part RC-4780
Awesome filters... just replace a K&N that was originally installed (Feb 2016) on my 03 Dodge 5.9 2500 Cummins back on Jan 2004. 12 years and 170,000 miles on that one filter. Cleaned and recharged several times, always performed flawlessly. In fact, after I installed the new filter, I removed and cleaned and recharged the old filter and placed it in a plastic bag and in a box as a backup. I also used K&N filters in my 95 Mustang 5.0 Cobra and my 65 289ci V8 Mustang. 5 stars filters for my mustangs.

San Bernardino, California
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 3, 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