K&N® 33-2409 - 33 Series Air Filter

K&N Performance Air Intake Systems
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 Dealer
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33 Series Air Filter (33-2409) by K&N®. Get better performance, superior engine protection and more economical operation just by changing your air filter. The K&N air filter gives you increased airflow without sacrificing filtration ability. It's the last air filter you'll ever buy for your car.

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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.

Brand: K&N       Part Number: 33-2409       UPC: 024844232519
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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.

Product Reviews (1)

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® 33-2409 - 33 Series Air Filter
K&N® - 33 Series Air Filter
Average Rating:  5  5 of 5
great value
2009 Infiniti FX50 | Posted by | (Springfield Gardens, NY)

easy to install on my Infiniti fx50s recommended to all wish there cold air inter for fx full accessories for it great prodect thank to car I'd I got it easily

4 people found this review helpful.
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Vehicle FitmentThis part is compatible with 42 vehicle(s)
Year Make Model Fitment Notes
2015 Infiniti QX70
2015 Nissan Rogue Select
2015 Nissan Sentra
2014 Infiniti Q70 5.6L
2014 Infiniti QX70
2014 Nissan Juke
2014 Nissan Rogue Select
2014 Nissan Sentra
2013 Infiniti FX37
2013 Infiniti FX50
2013 Infiniti M56
2013 Nissan Juke
2013 Nissan Rogue
2013 Nissan Sentra
2012 Infiniti FX35
2012 Infiniti FX50
2012 Infiniti M56
2012 Nissan Juke
2012 Nissan Rogue
2012 Nissan Sentra 2.5L
2011 Infiniti FX35
2011 Infiniti FX50
2011 Infiniti M56
2011 Nissan Juke
2011 Nissan Rogue
2011 Nissan Sentra 2.5L
2011 Nissan X-TRAIL
2010 Infiniti FX35
2010 Infiniti FX50
2010 Nissan Rogue
2010 Nissan Sentra 2.5L
2010 Nissan X-TRAIL
2009 Infiniti FX35
2009 Infiniti FX50
2009 Nissan Rogue
2009 Nissan Sentra 2.5L
2009 Renault Koleos
2008 Nissan Rogue
2008 Nissan Sentra 2.5L
2008 Nissan X-TRAIL
2007 Nissan Sentra 2.5L
2007 Nissan X-TRAIL
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Product Reviews (1)
Product Reviews (1)
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