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K&N33-2181 33 Series Air Filter - Cotton gauze, Oiled, Washable, Direct Fit

Part #: K33332181 | Mfr #: 33-2181

In Stock
Ships out in 1-2 Business Days
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5 5 out of 5 stars
(7 customer reviews)

$46.99

List Price: $73.40

Save: $26.41

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  • Overview
  • Manufacturer info
  • Related Products
  • Series: K&N 33 Series
  • Material: Cotton gauze
  • Type: Washable
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Recommended Use: Performance
  • Style: Oiled
  • Anticipated Ship Out Time: 1-2 Business Days
  • Filtration Efficiency Rating: 96 to 99%
  • Notes: 2 required per vehicle
  • Warranty: Million-mile K&N limited warranty
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Product reviews

Perfect fit and quality by Luiscfq, August 15, 2014

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You can see the filter superior quality when compare with filters installed on the dealerImprove performance as claim not sure But I m sure the filter are better that OEM


More air flow = less filtering by Rusm, September 12, 2011

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After I received 2 filters for my 2 cars, I was alarmed by visible less filtration fiber in K&N filters. In many instances you can see small openings in the fiber. Fiber has some oil that helps to collect dirt from air, but sometimes that can also mess up ignition things. Filter build solidly, but the main working function clearly not as good as a regular ( original) filter. I went on other web sites to read reviews about it. Many people impressed by it's solid build, but informed ones all point to potential problems from using it. Bottom line it will allow more air, but at expense of allowing more dirt in to an engine. Following common sense, in industrial settings nobody uses type of filters as K&N does, in semiconductors manufacturing, in clean rooms all filters are HEPA, and fiber type similar to regular (original) filters. Using K&N filters might void warranty on your car. Will be returning these today, and will get original ones at third of the price.


by Kaiser, November 30, 2009

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Good price for a product that usually double with Mercedes Benz dealers. Top quality product


by , June 12, 2009

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Better than I expected when compared to stock part replaced.


K&N Filter by Teflonman, April 27, 2009

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I had to get two of these for my Mercedes. Not a fault of K&N, but the filter box is a b--tch to get to in that car. However, their filter is actually quite a bit different than the Mann filter that came with it, but I don't think there are any issues.


k & N filters by zack, January 12, 2009

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The worst customer service ever they advertized one price and charged me another claimed it was a different item however K N only makes one filter for my car


Great Price and Purchase by BillyL, December 23, 2008

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On time delivery, item was what I order. The website was easy to use and review items for purchase, and was well designed for quick check out.