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air-cleaners

K&N RX-3900-1 - Air Cleaner Assembly

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$72.24

$131.99

You save: $59.75 (45%) off MSRP

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Ships within 5 business days

This is a universal fit product

  1. That means this product doesn’t have fitment for any specific vehicle.
  2. If fitment is applicable for your application, be sure to check compatibility with the other components.
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About this product

Part #: RX-3900-1

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.

More Details

Air Filter Large End Diameter4.5 in (114 mm)
Carb/Air Horn Dia. (in.)3
Diameter Outside (in.)4.5/6
Filter Re-Oiling Amount0.76 oz (23 ml)
Flange Angle0 degrees
Flange Offset0 in (0 mm)
Flange TypeCentered
Inner WireNo
MaterialRubber Base
ShapeRound Tapered
Top Outside Diameter6 in (152 mm)
Top StyleX-Stream
Additional Documents
  1. Technical Bulletinpdf
  2. Installation Instructionspdf

See what our community says about kn products

Kabir Adeyemi

91

Kabir Adeyemi
1990 Nissan 300ZX
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Performance
Is this your first time buying from this brand? Did you consider other brands?
NO
Was it easy to install? Any installation tips that will help others?
Easy
Once you've had a chance to use the product, did it meet your expectations?
Good bang for the buck
View on Kabir's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Proven performance, and great looks. Isolation from heat provided by the shield is very effective.
View on Matt's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
The old filter was clogged so I got a high flow replacement to give my engine a little more power.
Is this your first time buying from this brand? Did you consider other brands?
No
Was it easy to install? Any installation tips that will help others?
Yes
Once you've had a chance to use the product, did it meet your expectations?
Yes
Any additional comments?
made a noticeable difference in power
View on Nick's build
Dawson Johannes

197

Dawson Johannes
2004 Honda Civic
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Performance, price, ease of use
Is this your first time buying from this brand? Did you consider other brands?
Love K&N
Was it easy to install? Any installation tips that will help others?
Very easy to install
Once you've had a chance to use the product, did it meet your expectations?
I didn't really notice a difference besides a little more noise.
View on Dawson's build
Derick Thoene

19

Derick Thoene
2015 Toyota Prius
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Its a prius i purchased before checking online to see how others had fared with it not really a noticeable gas mileage increase but at least I won't have to change it
View on Derick's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

About K&N

K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and air intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies.

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