K&N® 33-2857 - 33 Series Panel Air Filter

51 reviews / Item # mpn1916969
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K&N Air Filters

33 Series Panel Air Filter (33-2857) 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 37 vehicle(s)
Year Make Model Fitment Notes:
2015 Volkswagen Touareg
  • 3.0L / 3.6L
2014 Audi Q7
  • 3.0L
2014 Porsche Cayenne
2014 Volkswagen Touareg
  • 3.0L / 3.6L
2013 Audi Q7
  • 3.0L
2013 Porsche Cayenne
2013 Volkswagen Touareg
  • 3.0L / 3.6L
2012 Audi Q7
2012 Porsche Cayenne
2012 Volkswagen Touareg
  • 3.0L / 3.6L
2011 Audi Q7
2011 Porsche Cayenne
2011 Volkswagen Touareg
2010 Audi Q7
2010 Porsche Cayenne
2010 Volkswagen Touareg
2009 Audi Q7
2009 Land Rover Range Rover
2009 Porsche Cayenne
2009 Volkswagen Touareg
2008 Audi Q7
2008 Land Rover Range Rover
2008 Porsche Cayenne
2008 Volkswagen Touareg
2007 Audi Q7
2007 Land Rover Range Rover
2007 Volkswagen Touareg
  • 3.6L / 4.2L / 5.0L
2006 Audi TT Quattro
  • 3.2L
2006 Land Rover Range Rover
2006 Porsche Cayenne
2006 Volkswagen Touareg
2005 Audi TT Quattro
  • 3.2L
2005 Porsche Cayenne
2005 Volkswagen Touareg
2004 Porsche Cayenne
2004 Volkswagen Touareg
  • 3.2L / 4.2L
2003 Porsche Cayenne
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Product Reviews


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K&N® - 33 Series Air Filter
K&N® 33-2857 - 33 Series Panel Air Filter
Average Rating: 5 of 5
5 of 5
2004 Touareg K&N air filter (2 each)
2004 Volkswagen Touareg / Posted by (Montclair, VA) /

The product fits perfectly and the increased air flow has resulted in a five percent increase in MPG, thanks. RY.

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K&N® - 33 Series Air FilterK&N® 33-2857 - 33 Series Panel Air Filter    $52.99
51 reviews
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