SKU: 39478615403

K&N Air Filter (33-2435)

Sale price$49.67 Regular price$55.19
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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16

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Description

K&N Air Filter (33-2435)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: 39478615403

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4.0 ★★★★★
Based on 12 reviews
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Verified Purchase
Rich Coleman
Louisville, US
★★★★★ 5
Definitely a good surprise
Size: 12.5, Color: A Black
Absolutely the most comfortable shoes I have ever had. Extremely lightweight true fit. They are very breathable. They are not a running sneaker. They seem to be very durable as I wore them everyday of vacation while walking around Las Vegas. I would definitely buy them again. Very good buy for the price
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Reviewed in the United States on April 23, 2026
M
Verified Purchase
M. Ross
Charlottesville, US
★★★★★ 5
Didn't fit my narrow feet, but still excellent shoes at a great low price
Size: 11, Color: A Black
These are some of the lightest shoes I've ever seen, but the build quality appears to be excellent. They're tongue-less, like slip-ons, but unlike some, you can adjust the tightness with the laces. The body of the shoe is a mesh-like fabric, which allows good breathability and overall comfort, and the soles are a molded rubbery material with nice treads for grip. I've been wearing a name-brand shoe made very similarly for a couple of years, and these are a very good likeness of them, at a much lower price. I like them because of the light weight and the fabric, which make them feel almost like you're barefoot. Unfortunately for me, I have narrow feet, and these fit more like a D width shoe, with more room in the toe box than I can handle. I'm returning them for that reason. For people with "normal" feet, these make really nice, stylish and comfortable shoes. I don't know how well they would hold up to sports or running, but for walking and day-to-day wear, they're great. I suppose I could grade them down because they don't fit my feet, but I find lots of shoes don't, and many makers use D width as the default for men's shoes. So I'm still rating them as 5 stars.
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Reviewed in the United States on July 21, 2025
K
Verified Purchase
Kayleb
Omaha, US
★★★★★ 3
In a pinch they're worth it.
Size: 12, Color: D Grey
I got the dark gray color. They came exactly as pictured and are decently comfortable but as far as packaging it's very poor. They come in a small plastic bag all squished and deformed so you have to wear them a few times before they take shape again. For the price it's a great buy for some generic work shoes or something, the bottom tread doesn't last long at all though if you're expecting them to last a long time as it will be gone in a week or two if you wear them frequently. Buy them if you don't feel like spending a lot of money on shoes but want a new pair cheap.
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Reviewed in the United States on April 22, 2026
L
Verified Purchase
Leo
Whiting, US
★★★★★ 5
Ladies, don't be afraid. Buy 'em. Trust me
Size: 9.5, Color: A Black
My elderly mother adores these. She had to have breathable awesome shoes for post-surgery and these fit the bill (and her feet!) So i got some for me. Whoa. Comfort! And I love the slip-on ease, b/c sometimes I just need to go, go, and go some more. Love them in black, haven't had long enough for durability, but helpful for my mom in her physical therapy and they're holding up to the worst she can do to them.
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Reviewed in the United States on April 28, 2026
D
Verified Purchase
David Staats
Battle Creek, US
★★★★★ 4
Good overall shoe, great for basic needs
Size: 12, Color: A Black
These are nice shoes. I put $40 arch support insoles in mine, so I like them even more, but they were fairly comfortable even without. They fit well, though slightly large, and seem to hold up well. No real complaints, though made a bit cheaply.
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Reviewed in the United States on May 12, 2026

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