SKU: 1157639253

K&N XStream (R) Universal Air Filter (RX-4870)

Sale price$105.83 Regular price$117.59
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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

K&N XStream (R) Universal Air Filter (RX-4870)K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air filters are constructed with ultra strong molded

K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.

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: 1157639253

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Lowell, US
★★★★★ 5
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As a first time user of O’CHEAL Anti Crack Care Cream…Wasn’t too satisfied with this product! The Peach scent wasn’t as solid as the original. I had a difficult time pulling the cover off and the stick broke…making application really messy! Product did not live up to the advertisement!
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Reviewed in the United States on January 14, 2026
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ALK
Battle Creek, US
★★★★★ 5
It works!!
Color: 2pcs
Not greasy, easy to use. Good for travel.
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Reviewed in the United States on May 9, 2026
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Tanya
Boise, US
★★★★★ 5
Pies sin grietas e hidratados
Color: 2pcs
Me encanto, hidratación completa de mis piecitos
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Reviewed in the United States on May 5, 2026
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Jeanné Timms
New York, US
★★★★★ 5
Best budget dupe by far
Color: Gold, Size: 3.38 Fl Oz (Pack of 1)
Love, love, love it. Love the price, love the feel, love the smell. It absorbs fully not greasy at all and leaves just a hint of glow on your skin.
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Reviewed in the United States on May 14, 2026
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Emma
Los Angeles, US
★★★★★ 5
Great! Smells good, and subtle sparkle!
Color: Gold, Size: 3.38 Fl Oz (Pack of 1)
Smells so good !!!!
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Reviewed in the United States on May 24, 2026

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