SKU: 40231938220

K&N Air Filter (33-2331)

Sale price$49.67 Regular price$55.19
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

K&N Air Filter (33-2331)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

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.

Features:

  • 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

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 40231938220

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4.4 ★★★★★
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Ashe
Los Angeles, US
★★★★★ 5
Best sunscreen I tried. Be sure to rub it in and let it absorb into your skin.
Size: 6.76 Fl Oz (Pack of 1), Style: Lotion (SPF 50)
This is an excellent product that absorbs quickly and leaves no chalky white or thick oily residue. UVA and UVB protection at spf 50. Two out of four of the active ingredients are double the amount in other brands and it has more of the two remaining ingredients so I guess it’s not my imagination that it’s more effective than other brands I’ve used. No detectable odors. Has an ingredient to help sand from sticking but I haven’t been on sand so can’t comment on that. It left white marks on the edge of the neck of my black crew neck T-shirt when I didn’t rub the sunscreen in and let it dry. However the marks came out in the wash. It stays where you put it, but keep it away from the eyes. Expensive probably because there are more of the active ingredients. I use it only on my face and neck but it is the best sunscreen I have tried.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
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Verified Purchase
Reads reviews but somehow never submit them lol
Port Orchard, US
★★★★★ 5
Best sunscreen
Size: 6.76 Fl Oz (Pack of 1), Style: Lotion (SPF 50)
Best sunscreen ever. No breakouts. No scent (crucial). Melts into your skin, lasts for a good while. Expensive but worth it.
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Reviewed in the United States on May 2, 2026
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Tagen
Louisville, US
★★★★★ 5
Might stain certain fabrics?
Size: 6.76 Fl Oz (Pack of 1), Style: Lotion (SPF 50)
Great product, works well. My only complaint is I believe it might have stained my white, UV blocking running top. After the first use there was yellowing all long the neckline and sleeves where I either accidentally got it on the shirt or sweating transferred it on. I’ve never had this problem before and can’t 100% be sure the lotion itself is to blame but it is the only thing that changed from other times I ran in that top. I haven’t noticed this problem with other tops so I’m not sure if it was the material itself or the color that reacted. Still going to give it 5 stars because I like the product.
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Reviewed in the United States on March 31, 2026
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Michelle Zaugg
Alexandria, US
★★★★★ 5
My favorite.
Size: 6.76 Fl Oz (Pack of 1), Style: Lotion (SPF 50)
I love this stuff. It's non-comedogenic, so it doesn't break me out. I've noticed a considerable difference in my acne scars after using it for a couple weeks. It is a little greasy and there's a very slight white cast, but I don't mind because I just let it dry and then put some powder over the top. Plus, the cast is easy to rub in and makes my skin tone look more balanced (I am white, though). Hope this helps!
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Reviewed in the United States on May 7, 2026
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Tln_tinkering
Bozeman, US
★★★★★ 4
Good sunblock
Size: 6.76 Fl Oz (Pack of 1), Style: Lotion (SPF 50)
This is my go-to sunblock reconnect by my dermatologist. It has a good skin feel, and seems to do the job required.
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Reviewed in the United States on January 12, 2026

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