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E-2420
$41.99 USD
MSRP $65.99 36.4% Off
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K&N E-2420 Air Filter

Replacement Filters > Replacement Air Filter
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.14 oz (34 ml)
FlangesNone
Height3.875 in (98 mm)
Inner WireNo
Inside Diameter4.25 in (108 mm)
Outside Diameter6 in (152 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height7.25 in (184 mm)
Product Box Length6.5 in (165 mm)
Product Box Width6.5 in (165 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleOpen
Weight1.2 lb (0.5 kg)

Customer Feedback

Be the first to review part E-2420
Hellishly expensive, but K & N has been hellishly expensive for the 30 years I've been using them. I put two of these RU-1100s onto the mikunis carbs on my fairly heavily-modified 72 triumph bonneville street bike, after measuring the clearances, top to bottom, side to side, and front to back. The filters fit just like I planned, and work just like I intended. T the significant thing that makes K & N worthwhile, aside from the quality of the filters themselves, is the extensive size information available online. I'm used to having to guess how big things are based on vague descriptions, and then sending them back for a second try, or a third, or giving up. The very complete and specific information on the K & N website allowed me to work out exactly what I needed from fifteen or twenty alternative lengths, widths, and inside and outside diameters, and the filters fit perfectly, with exactly the clearances I planned. I i also use four K & N filters on my 74 triumph trident, three on the 26mm mikuni carburetors and another on the crankcase breather. I i'm running 35mm keihin FCR carbs on my 1965 triumph land speed race bike, and if I could figure out how to put filters over the FCR open velocity stacks, I'd use them there. No application for those carbs, unfortunately. if you come up with one I'll use them.

Kevin Roberts
Belmont, Ohio
Have always used K&N oil filters on both my Beta and Triumph. Really like the wrench-off nut on the Triumph can filter. Wonder if you have ever tried to invert the nut into the can to get a more flush cross section. As it is the nut is a bit below the bottom of the frame (on Triumph) making one take caution in lifting the bike for chain care.

Jerry Parker
DeBary, Florida
Ordered this with free shipping, got it sent direct to my technician. Arrived very quickly, quicker than expected in all honesty along with a couple of free stickers Fits perfectly to my Triumph America, no leaks or mess.

Ian Woodward
Nottinghamshire, England