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K&N 4-Inch Round Tapered Air Intake Filter - Washable, High Performance, 5.5-Inch Height

4.6 4.6 out of 5 stars 4,421 ratings

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Purchase options and add-ons

Brand K&N
Product Dimensions 6"L x 6"W x 5.5"H
OEM Part Number RG-1001RD
Shape Oval, Round, Conical
Product Grade
Replacement Part
Fit Type
Vehicle Specific Fit

About this item

  • ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
  • 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
  • RUGGED CONSTRUCTION: K&N Universal Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
  • CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
  • EASY INSTALLATION: K&N Air Filters are pre-oiled and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
  • UNIVERSAL FITMENT: Designed for use on a variety of applications
  • REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty
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K&N 4-Inch Round Tapered Air Intake Filter - Washable, High Performance, 5.5-Inch Height
K&N 4-Inch Round Tapered Air Intake Filter - Washable, High Performance, 5.5-Inch Height
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K&N Universal Clamp-On Air Intake Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange L: 1.125 In, Shape: Round Tapered, RG-1001WT
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K&N Universal Clamp-On Air Intake Filter: High Performance, Premium, Washable, Replacement Air Filter: Flange Diameter: 6 In, Filter Height: 6.5 In, Flange Length: 1 In, Shape: Round Tapered, RU-1042
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Price-10% $35.99
Typical:$39.99
$39.98-10% $35.99
Typical:$39.99
$27.99$78.70$67.49
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Value for money
4.7
5.0
4.6
4.2
4.7
Easy to install
4.7
5.0
4.8
4.4
4.9
Mileage
4.6
4.6
4.7
4.6
Sold By
Amazon.com
Auto_Hsy
Amazon.com
RIAYOOE
Amazon.com
Amazon.com
material
Paper
Paper
Rubber
Cotton
model number
RG-1001RD
RG-1001WT
XH-UN101-101-RD
21-209ED-HK
RU-1042
fit type
Vehicle Specific Fit
Universal Fit
Vehicle Specific Fit
Universal Fit
Vehicle Specific Fit
Universal Fit
shape
Round, Oval, Conical
Cone type
Oval, Conical
Conical
Round
Round
product grade
Replacement Part
Performance Part
Replacement Part
Tuning
Replacement Part
Replacement Part

Product Description

K&N Universal Clamp-on Air Filters are manufactured for a wide variety of applications and unique filtration needs. K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow. Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your vehicle. These versatile filters are constructed with ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. Available in round, tapered (cone-style), and oval designs, K&N offers thousands of clamp-on filters in a multitude of shapes and sizes that cater to many precise applications. Join the millions of customers who have saved money and improved vehicle performance by upgrading to K&N filtration.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Please verify this Specification Sheet [PDF 350 KB]

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K&N 4-Inch Round Tapered Air Intake Filter - Washable, High Performance, 5.5-Inch Height


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What's in the box

  • 6" OD B X 5.5"H W/4", 3-1/2", 3"DIA FLG W/INVERTED FILTER TOP
  • Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    4,421 global ratings

    Customers say

    Customers like the quality, fit, and value of the engine air filter. For example, they mention it's a high quality cone filter, it fits perfectly, and is well built. Some appreciate the performance and value for money.

    AI-generated from the text of customer reviews

    62 customers mention59 positive3 negative

    Customers are satisfied with the air filter. They mention it's a high-quality filter, that filters well, and is easy to install. Some say it'll provide noticeable results over their previous filter.

    "Awesome universal cone air filter. My install was easy just added a tube and cut a hole for the MAF sensor...." Read more

    "Filter is great, sounds good, can tell an immediate difference between this filter and the cheap filter that came with my cold air intake...." Read more

    "This is a great filter. Works best with a customized or aftermarket open air box. Really compliments the sound of turbo flutter...." Read more

    "...Noticeable results over my previous filter." Read more

    54 customers mention39 positive15 negative

    Customers like the fit of the engine air filter. For example, they say it fits perfectly, works perfectly, and is easy to clamp on. Some mention that the adapters for smaller intake diameters are a nice bonus. That said, most are happy with the fit and recommend it.

    "Fit great, easy installation and looks great under the hood of my 04 2500HD 4x4 silverado with the 6.0." Read more

    "Perfect fit thanks to the modular design. Comes with the hose clamp also and pre-oiled. Very convenient" Read more

    "The first universal one they sent me was way. Way way too big this one come with options and fit perfect" Read more

    "These fit right over the stock pipe ends. Using the 4" on one and 3.5 sleeve thats supplied on the other...." Read more

    49 customers mention43 positive6 negative

    Customers are satisfied with the quality of the engine air filter. They mention that it is a high quality cone filter, well built, and reusable. Some say that the material is good and the product flows air extremely well. Overall, most are happy with their purchase and recommend it to others.

    "...No more 'hot air intake' with the filter being setup this way also, just be sure to not choke the engine of air, or you're going to be running the..." Read more

    "Well made, easy to clean and reuse over and over and over." Read more

    "...However ,it fits better due to the smaller size and is Great quality !" Read more

    "...Spectre used to be cheap, but decent quality. I would have spent $60 for a Spectre filter, Vs a legit K&N filter I found here!..." Read more

    49 customers mention49 positive0 negative

    Customers appreciate the value of the engine air filter. They mention that it is a great budget filter, way cheaper for a brand name 3.5" cone than anywhere else, and provides good quality for the price.

    "...The filter pricetag was pretty cheap considering the quality you are getting...." Read more

    "Good value, a K&N filter under 40 bucks???? Not bad at all" Read more

    "Nice expensive but nice" Read more

    "great budget filter made my mercedes sound very nice, very easy to install.I will now only buy from K&N for my air filters✔️" Read more

    48 customers mention48 positive0 negative

    Customers are satisfied with the performance of the engine air filter. They mention that it works well, it looks fantastic, and is easy to install. Some say that it helps in the acceleration and gas mileage. Overall, customers are happy with the filter's performance.

    "...an amazing sound when driving around, I feel like it makes my car faster at acceleration and definitely the sound is loud at increasing RPMs...." Read more

    "...My gas mileage has improved a lot Thank God!!!..." Read more

    "It works very nice, it looks fantastic, and it’s easy to install. Would definitely buy again." Read more

    "...Routed my own silicone hose elbow to the KN.This thing flows soo well!Suzuki Alto Works" Read more

    33 customers mention33 positive0 negative

    Customers find the installation of the engine air filter to be convenient and easy. They mention that it looks great, is oiled, and ready to go. Some customers also say that it's easy to make your own custom intake with K&N's line up.

    "Awesome universal cone air filter. My install was easy just added a tube and cut a hole for the MAF sensor...." Read more

    "...The process was very easy but you do need a couple of tools for screws and a flat head screwdriver to un-loosing the clamp on the K&N filter to fit..." Read more

    "Fit great, easy installation and looks great under the hood of my 04 2500HD 4x4 silverado with the 6.0." Read more

    "...Comes with the hose clamp also and pre-oiled. Very convenient" Read more

    31 customers mention31 positive0 negative

    Customers are satisfied with the appearance of the engine air filter. They mention that it looks good, legit, and perfect. Some say that the materials are good.

    "Fit great, easy installation and looks great under the hood of my 04 2500HD 4x4 silverado with the 6.0." Read more

    "Nice expensive but nice" Read more

    "It works very nice, it looks fantastic, and it’s easy to install. Would definitely buy again." Read more

    "...Other than that it’s a great looking filter and if I had the space I’d probably use it for the last I went with a different K&N filter that had the..." Read more

    22 customers mention22 positive0 negative

    Customers are satisfied with the sound quality of the engine air filter. They mention that it has a souped up sound, it makes their car sound better, and it compliments the sound of turbo flutter. Some say that the filter makes a huge difference in noise and 10-15 horses. Overall, customers are happy with the performance and sound quality.

    "...Such an amazing sound when driving around, I feel like it makes my car faster at acceleration and definitely the sound is loud at increasing RPMs...." Read more

    "...the filter is ducted like I did, you get the added bonus of the intake rush noise, and colder incoming air...." Read more

    "...filter sucking in a gulp of air saying I can breathe and my turbo was hissing so loud in a good way💯👍...." Read more

    "great budget filter made my mercedes sound very nice, very easy to install.I will now only buy from K&N for my air filters✔️" Read more

    Fabbed up a custom CAI.
    5 Stars
    Fabbed up a custom CAI.
    Custom CAI couldn't have turned out better, I was going for the "sleeper" style of intake but didn't like the idea of cutting a hole in the hood for a ram cowl induction.This filter as some of you know, it being a K&N filter needs to be oiled and washed to keep contaminants out.The filter pricetag was pretty cheap considering the quality you are getting.The filter looks well made, no factory defects I can see of.If the filter is ducted like I did, you get the added bonus of the intake rush noise, and colder incoming air. No more 'hot air intake' with the filter being setup this way also, just be sure to not choke the engine of air, or you're going to be running the engine with a rich A/F, Size ducting accordingly.The only part of this project that sucked was that I needed to cut a hole into the radiator core support, for the ducting/filter to come through.
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    Top reviews from the United States

    Reviewed in the United States on November 16, 2023
    Customer image
    5.0 out of 5 stars Amazing Sound and it’s a K&N
    Reviewed in the United States on November 16, 2023
    Awesome universal cone air filter. My install was easy just added a tube and cut a hole for the MAF sensor. Such an amazing sound when driving around, I feel like it makes my car faster at acceleration and definitely the sound is loud at increasing RPMs. Did set my check engine light On but with a small fix it stays off. I would highly recommend buying and installing on your car. 👍 👍

    Installed on a 2016 Mitsubishi Outlander Sport 2.4 liter awd
    Images in this review
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    Customer image
    One person found this helpful
    Report
    Reviewed in the United States on August 16, 2023
    Customer image
    sam
    5.0 out of 5 stars Fabbed up a custom CAI.
    Reviewed in the United States on August 16, 2023
    Custom CAI couldn't have turned out better, I was going for the "sleeper" style of intake but didn't like the idea of cutting a hole in the hood for a ram cowl induction.

    This filter as some of you know, it being a K&N filter needs to be oiled and washed to keep contaminants out.

    The filter pricetag was pretty cheap considering the quality you are getting.

    The filter looks well made, no factory defects I can see of.

    If the filter is ducted like I did, you get the added bonus of the intake rush noise, and colder incoming air. No more 'hot air intake' with the filter being setup this way also, just be sure to not choke the engine of air, or you're going to be running the engine with a rich A/F, Size ducting accordingly.

    The only part of this project that sucked was that I needed to cut a hole into the radiator core support, for the ducting/filter to come through.
    Images in this review
    Customer image Customer image Customer image
    Customer imageCustomer imageCustomer image
    4 people found this helpful
    Report
    Reviewed in the United States on March 13, 2024
    Reviewed in the United States on December 20, 2020
    12 people found this helpful
    Report
    Reviewed in the United States on September 27, 2023
    Reviewed in the United States on February 6, 2024
    Reviewed in the United States on January 23, 2024
    Reviewed in the United States on January 5, 2024

    Top reviews from other countries

    Translate all reviews to English
    Big Dog
    5.0 out of 5 stars Excellent quality and fit
    Reviewed in Canada on February 4, 2024
    Gustavo
    5.0 out of 5 stars Excelente calidad, simplemente el original.
    Reviewed in Mexico on November 12, 2023
    Andres
    5.0 out of 5 stars Va de maravilla
    Reviewed in Spain on March 3, 2024
    Giuliano
    5.0 out of 5 stars Perfetto per audi a4 b6
    Reviewed in Italy on December 6, 2023
    Customer image
    Giuliano
    5.0 out of 5 stars Perfetto per audi a4 b6
    Reviewed in Italy on December 6, 2023
    Acquistato per la mia audi a4 b6 1.9tdi 130cv. Unica pecca è la confezione che mi è arrivata leggermente rotta per il resto il cono era perfetto, si fa molta fatica a montarlo. Sulla mia auto ho il MAF da 76 mm quindi ho staccato il primo anello dal filtro, quello più piccolo e ho provato ad attaccarlo al maf, dopo tanti sforzi ho messo l'anello di gomma 20/30 secondi al microonde per ammorbidire la gomma e son riuscito, poi ho attaccato il MAF al cono grazie ad un poco di grasso. Ci ho messo quasi un'ora ma il risultato è spettacolare. Il suono del motore è più cattivo e si sente respirare la macchina. La turbina sbuffa molto e si riesce a sentire anche il turbo flutter alle volte. Consiglio.
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    One person found this helpful
    Report
    Kaan Öz
    5.0 out of 5 stars Beste Option
    Reviewed in Germany on November 5, 2023
    5 people found this helpful
    Report