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K&N 33-2451 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   30 Customer Reviews
  • 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.

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Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.86 oz (26 ml)
Height0.875 in (22 mm)
Outside Length10.125 in (257 mm)
Outside Width6.5 in (165 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height13.56 in (345 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight1 lb (0.5 kg)

K&N 33-2451 Air Filter Product Reviews

See all reviews!
Review part 33-2451
Friday, February 05, 2016 - Part 33-2451
Perfect Fit for a replacement air filter for my GF Kia. I prefer CAI on my vehicles but for resale value this is a great money saver upgrade that will increase resale if that's your goal. And I love the idiot proof sticker for the air box and warranty card that is included with every order.

Gavin Roberts
Hillsboro, Oregon
Thursday, January 07, 2016 - Part 33-2451
Great product as usual. Fit perfectly. Sounds awesome and gave car about a half second quicker to 60 now 6.2. 2014 Kia forte 2.0. Mid range power increase is the best part other than that awesome sound.

Kerry Mcneal
Okeana, Ohio
Wednesday, December 23, 2015 - Part 33-2451
Great to work with and great product.

Indianapolis, Indiana
Monday, December 07, 2015 - Part 33-2451
K&N is No. 1 . Installing this air filter in my new Elantra GLS made the car come alive . I've used K&N for years in all my vehicles including my Harleys and all 6 vehicles I own at the moment .

Ed McInnis
Nova Scotia , Canada
Saturday, December 05, 2015 - Part 33-2451
I'm a lady and doubt anything the 1st mechanic tells me just to make sure I'm not being ripped off. So, during my oil change he asked me if I wanted to replace the air fitler? I thought it was included as they incl. it at dealership for same service. So, I told him no despite the leaves and crap in it. lol I googled it when I got home and realized it really does need to be replaced for the functionality and better performance of my Hyundai Elantra GT 2013. Came across this site and great reviews on YouTube on same vehicle, so I made the investment. I cannot explain to you how it feels like I have a new sports car. The difference is astounding My car accelerates fast and just goes faster period. It is like night and day.I found myself racing Hondas and BMW's now. Haha. Hondas I past now, but not the bmw unfortunately, but I give them a challenge make them double take my car now. I also got about 40 more mile out of a tank of gas may have gone further as I didn't run out before refill. Proof was on my fuel stop app. Worth the investment. Thanks

East Chicago, Indiana
Monday, November 09, 2015 - Part 33-2451
Perfect fit.

Dallas, Texas
Friday, October 23, 2015 - Part 33-2451
As usual, a perfect fit and fast delivery. I have used K&N filters for a number of years. They last and perform well. No engine of mine has ever experienced signs of premature wear due to poor induction filtering. What I find is I get a little better throttle response and these end-up lasting the life of my cars which I keep well over 100k miles. Cleaning and recharging them is easy and worth the minor effort.

Arthur Royce