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 Sep 5 - Sep 10

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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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4.1 ★★★★★
Based on 14 reviews
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M
Verified Purchase
Michelle
Omaha, US
★★★★★ 5
Vibrant IPad case
Color: Purple+Colorful, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
My daughter loves her new case. Very sturdy , strap is strong and supported when in use and just the colors alone looks exactly like the picture
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
K
Verified Purchase
Kindle Customer
Alexandria, US
★★★★★ 5
Durable, Full iPad protection, Good quality for the price, variety of colors
Color: Navy Blue, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
I am very happy with this SEYMAC case. The build quality is excellent—solid, rugged, and clearly designed to protect the iPad. The full body coverage with the built in screen protector gives me a lot of peace of mind, especially since this iPad gets used by my daughter for her art projects and she takes it everywhere. The 360° rotating hand strap and stand are surprisingly useful. The rotation is smooth, the strap feels secure, and the stand locks into angles that actually work well for drawing or watching videos. The added shoulder strap is a great touch too—it makes carrying the iPad hands free incredibly convenient. The strap doesn’t get used as much because it is typically in a bag or in her hand as she creates. The fit is perfect for the 10th gen iPad, and all the ports, buttons, and cameras line up exactly as they should. The Navy Blue color looks clean and professional without being boring. The added stylus holder is a plus as well. Overall, this case delivers outstanding protection and functionality. Its durable, designed well, and absolutely worth the price. I Highly recommended for anyone who wants serious protection without sacrificing usability. It also comes in a variety of colors so you can fit your personal style preferences.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
B
Verified Purchase
bernardo rosales
Whiting, US
★★★★★ 4
Great Case, Just Minor Issues
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
This case is an overall good case, in the sense that it does a good job protecting the tablet. It covers the entire screen with a plastic screen, which I personally like and don’t mind. It also had a kick stand and sting to hang it, which is a must for kids. My kid has not broken his tablet since getting this case, BUT he did not last very long with it on. The plastic screen protector and the front piece, made it super difficult for him to pull down his control center from the top right corner. This annoyed him so much that he ended up taking the whole case off and eventually losing it. If they could make the plastic sheet more fitted to the screen so that the issue is fixed I would give 5 stars.
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Reviewed in the United States on November 20, 2025
C
Verified Purchase
Carrie A. Shaw
Massapequa, US
★★★★★ 5
Great for portability and Many uses
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9'', Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
I use my iPad for work!! This case is a fantastic addition - easy to use when I’m on the couch or in the Office. Stand is easily changed from vertical to horizontal - Velcro handle can change large or small. My stylus also attached to the back so everything is ready on the GO
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Reviewed in the United States on May 14, 2026
R
Verified Purchase
Ravi M, Bloomfield NJ
Natrona Heights, US
★★★★★ 5
Great value to protect your ipad.
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
Nicely made and thought out product. Fits perfectly and comes with everything you need. Easy to install, looks very sturdy. The shoulder strap it comes with to carry it around makes it even more versatile.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026

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