K&N® 33-2448 - 33 Series Panel Air Filter

57 reviews / Item # mpn1919878
K&N® - 33 Series Air FilterK&N® - 33 Series Air FilterK&N® - 33 Series Air Filter Installation InstructionsK&N® - 33 Series Air Filter Airflow TestK&N® - Cleaning GuideK&N® - Air Filter Overview 602x420K&N Authorized DealerK&N Special OffersK&N Special OffersK&N Special Offers
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K&N Air Filters

33 Series Panel Air Filter (33-2448) by K&N®. A K&N 33 series OE replacement air filter is designed to increase horsepower and acceleration. These washable and reusable panel air filters are easy to install because they fit directly into the existing vehicle factory air box.

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  • Improves engine airflow
  • Increases horsepower and acceleration
  • Superior filtration without reduced airflow
  • Reduces maintenance costs
  • Washable and reusable
  • Get up to 50,000 miles between cleanings under normal driving conditions
  • Emissions legal in all States
  • Backed by K&N's Million Mile Limited Warranty

Most air filters on the market are a compromise. Many high-performance filters deliver better airflow, but sacrifice filtering ability and engine protection in the process. OEM filters, which are usually made of paper, filter adequately but at the expense of airflow. And airflow decreases as these air filters become dirty. Not so the K&N air filter. K&N air filters increase airflow without decreasing filtration ability, and the increased airflow remains consistent throughout the filter's service interval. The secret is in the K&N filter's construction.

K&N's initial goal was to develop a filter that would deliver increased airflow during dirty, dusty off-road racing conditions. Increased airflow improves the efficiency of the combustion process, increasing horsepower and torque. But just increasing airflow without ensuring adequate filtration under those conditions would result in a ruined engine. K&N's solution was a filter design consisting of 4 to 6 layers of cotton gauze sandwiched between two aluminum wire screens. The cotton is then treated with a specially formulated grade of oil that causes tackiness throughout the cotton’s microscopic strands. The resulting K&N filter not only delivers increased airflow while trapping dirt particles that could harm your engine, that level of airflow is maintained even as the filter gets dirty. The layers of oiled cotton fibers in the K&N filter trap dirt particles that are smaller than the holes in the filter media. The thickness of the layers also allows the K&N filter to trap dirt and dust on many levels, trapping more dirt without decreasing airflow. Contrast this with a paper filter that only traps dirt on its surface; as the surface area becomes clogged, the airflow rate goes down.

Each K&N air filter is custom designed to fit into your existing factory air box. The K&N filter is economical because it's the last air filter you'll have to buy for your car. It can be washed and reused many times, and since you can usually drive up to 50,000 miles between servicing, you won't have to clean it very often. And every K&N filter is backed by K&N's Million Mile Limited Warranty. By the way, check the CARiD reviews and read what the customers think of K&N porducts.

K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.

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Vehicle Fitment

This part is compatible with 20 vehicle(s)
Year Make Model Fitment Notes:
2015 Kia Cadenza
2015 Kia Optima
2014 Hyundai Azera
2014 Hyundai Sonata
2014 Kia Cadenza
2014 Kia Optima
2013 Hyundai Azera
2013 Hyundai Sonata
2013 Kia Optima
2013 Kia Sorento
2012 Hyundai Azera
2012 Hyundai Santa Fe
2012 Hyundai Sonata
2012 Kia Optima
2012 Kia Sorento
2011 Hyundai Santa Fe
2011 Hyundai Sonata
2011 Kia Optima
2011 Kia Sorento
2010 Hyundai Santa Fe
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Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

K&N® - 33 Series Air Filter
K&N® 33-2448 - 33 Series Panel Air Filter
Average Rating: 4.9 of 5
5 of 5
Great Filter
2013 Hyundai Sonata / Posted by (Cobourg, ON) /

Works better than my paper one. Had little more pep to the engine too.

Was this review helpful for you? Yes5   people found this review helpful.
5 of 5
Air Filter
2013 Hyundai Sonata / Posted by (Canovanas, PR) /

WOW, a very noticeable change in throttle response. Haven t measure yet the gas savings.

Was this review helpful for you? Yes2   people found this review helpful.
4.3 of 5
Kia Optima SX Turbo
2012 Kia Optima / Posted by (Orland Park, IL) /

I'm usually sketchy when it comes to buying aftermarket products for my car, especially those that are "recommended" by dealerships. However, after researching K&N filters I decided to buy one. Easy install, instant increase in acceleration. I did notice that the high flow filter does make for more engine noise for those of you who like a quite ride, although I usually drive with windows down and/or radio on so it's not noticeable. Good buy if your looking to spice up your car but it's only a filter so don't expect 5hp increases.

Was this review helpful for you? Yes4   people found this review helpful.
5 of 5
Kia and K&N
2011 Kia Optima / Posted by (Little Rock, AR) /

Easy install. Great price at CARiD and increased performance with mileage boost. Have used K&N products in my trucks and Harley Davidson's and the installation of K&N products is a all around gainer for the purchaser!

Was this review helpful for you? Yes3   people found this review helpful.
5 of 5
2012 Hyundai Sonata / Posted by (Glen Burnie, MD) /

Great filter - 3mpg more.

Was this review helpful for you? Yes2   people found this review helpful.
5 of 5
K&N Quality Air FIlter
2012 Hyundai Sonata / Posted by (Fresno, CA) /

Third K&N filter I've purchased. This one installed just as easily as the first two on my previous cars. On my 2012 Hyundai Sonata, no tools were needed as the airbox is held on by four snaps/clamps. Car feels like it has a little extra get up and go. If nothing else, big money saver over time from having to replace normal air filters with dealers also trying to tack on crazy labor charges too.

Was this review helpful for you? Yes1   people found this review helpful.
5 of 5
K&N Air Filter
2011 Kia Optima / Posted by (Millville, NJ) /

I have had one in every vehicle ever owned. Re-usable, saves money, more efficient and fits perfectly.

Was this review helpful for you? Yes5   people found this review helpful.
K&N® - 33 Series Air FilterK&N® 33-2448 - 33 Series Panel Air Filter    $48.99
57 reviews
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