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K&N

K&N Cold Air Intake System: High-Flow Air Filter, Increase Performance & Towing: Compatible with 1999-2004 Toyota: 4Runner, Tacoma, 57-9015-1

  • Based on 148 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Sep 20
Order within 14 hours and 43 minutes
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Style: 50 State Legal


Features

  • DYNO TESTING YOU CAN TRUST: K&N air intake horsepower/torque testing is performed on wheel-based dynamometers and the reports are included with each intake system.
  • IMPROVED ENGINE SOUND - HEAR THE GROWL: K&Ns intake systems allow your engine to breathe and sound as it should- your engine will growl on acceleration and return to quiet once at speed.
  • BETTER TOWING: K&N Air intake kit improves acceleration and uphill performance when towing by improving throttle response, overall horsepower and torque. Excellent for daily and highway driving.
  • PREMIUM ENGINE PROTECTION FROM A TRUSTED BRAND: K&N air intake will not void manufacturer vehicle warranty & No-Hassle Lifetime Limited Warranty protects for the life of your vehicle.
  • HIGH-FLOW REUSABLE AIR FILTER: 4 layers of pleated, breathable cotton with K&Ns red filter oil to absorb dirt & dust particles, allowing clean air to continue flowing into your engine, only needs cleaning every 100k miles under normal highway conditions.
  • EASY TO INSTALL: Includes detailed, step-by-step instructions & all necessary parts- the entire air intake system can typically be installed in less than 60 minutes with basic hand tools.
  • MADE IN THE USA: Proudly made in the USA for trusted quality & reliability and backed by US based customer support.

Description

K&N is the inventor of the Air Intake System and has over 50 years of experience in the performance filtration industry. Proudly designed and manufactured in the USA, this premium cold air intake system is specifically designed for your vehicle and is dyno tested to provide a guaranteed increase in horsepower. It features a high flow intake tube, custom heat shield, and oversized K&N Washable High-Flow Cotton Air Filter for ultimate airflow. This Intake system replaces the restrictive OEM air box to provide an improved driving experience for daily driving or towing. It installs easily in about 60 minutes and is backed by a No-Hassle Lifetime Limited Warranty and will not void your factory warranty.Compatible Vehicles:1999-2004 TOYOTA Tacoma1999-2002 TOYOTA 4Runner Designed to provide increased horsepower, the K&N 57-9015-1 Second Generation Fuel Injection Performance Kit is a quick solution for vehicle owners who are looking for an increase in reliable power. Street legal, installable in 90 minutes or less and built around K&N's High-Flow technology, which utilizes a special oversized and washable cotton gauze air filter and special cold air intake, nonmetallic tubes, the 57-9015-1 drives a massive amount of air into an engine, which translates into power affordable on virtually any budget. .caption { font-family: Verdana, Helvetica neue, Arial, serif; font-size: 10px; font-weight: bold; font-style: italic; } ul.indent { list-style: inside disc; text-indent: -15px; } table.callout { font-family: verdana; font-size: 11px; line-height: 1. 3em; } td.vgoverview { height: 125px; background: 9DC4D8 url( amazon.com/images/G/01/electronics/detail-page/callout-bg.png) repeat-x; border-left: 1px solid 999999; border-right: 1px solid 999999; padding-left: 20px; padding-right: 20px; padding-bottom: 10px; width: 250px; font-family: verdana; font-size: 12px; } Affordable, street legal horsepower upgrade. View larger. Measurable improved performance. View larger. Quick and easy installation. View larger. How High-Flow Technology Works How does the K&N 57-9015-1 increase horsepower? By eliminating airflow obstruction in your engine. Restriction of air flow between an air filter and an engine robs even the most powerful engine of horsepower. K&N air intake kits virtually eliminate air path restriction by replacing the standard air filter and the entire air path to the engine. The aerodynamically engineered conduit that makes up the 57-9015-1 drives a massive amount of air into an engine, which translates into power. This conduit begins with an oversized conical high-flow air filter. This larger filter can fit into the engine compartment using factory holes and mounting points because the K&N 57-9015-1 replaces your stock intake tube, and air box. This provides more airflow at lower restriction than a standard filter, limited by the size of the factory air box. The oversize air filter also captures and holds more dirt, increasing the service life before a cleaning is required (up to 100,000 miles). The filter is also isolated from high engine temperature by a heat shield designed to lower the temperature of the air entering the engine, which increases horsepower. The filter attaches to a rotationally molded tube made from nonmetallic interlaced high density polyethylene (HDPE). This allows for precision shaping of the tube to reduce turbulence and accelerate airflow into the engine. This is why some K&N tubes have unique shapes or indentations that are specifically engineered for each engine configuration. Finally, the tube is connected to the engine with adapters made from high strength materials such as silicon and reinforced nylon and ensures long life. Put all this together and you have the best high-flow intake system available today. Street Legal Many K&N intake systems are street legal in all 50 states and include a California Air Resource Board (CARB) Executive Order (EO) number that ensures the kit has been tested to comply with emissions standards. EO numbers apply to the kit as well as the year, make and model it is being installed on. Systems with no EO number are street legal in most states but may not be used on emissions controlled vehicles in the state of California or other states adopting California emission standards. Consult K&N's website to search by part to see which cold air intakes are CARB exempt for which vehicles. Key Features: Guaranteed to provide increased horsepower and acceleration (9.45 hp @ 4,842 rpm measured by manufacturer).Engineered to specific vehicle design. See vehicle search above for compatibility.Easy to install, usually in 90 minutes or less and lasts up to 100,000 miles before service is required, depending on driving conditions.CARB exempt and street legal in all 50 US States.Air filter is washable and reusable for extreme durability, but can also be easily replaced if necessary.Works with original manufacturer computer systems.Replaces OEM filter and air box, and is designed to use factory holes and mounting points whenever possible.Million mile limited warranty.What's in the Box 1-K&N 57-9015-1 Second Generation Fuel Injection Performance Kit (includes air intake tube, washable air filter, heat shields, hoses, hose clamps, hardware and detailed instructions necessary for installation). Limited Warranty K&N O/E replacement air filters and air intake systems purchased from authorized dealers are backed by a million mile limited warranty from the manufacturer when used primarily on paved roads and on vehicles for which they were designed. If one of these products ever fails to provide complete satisfaction, K&N will replace it at their discretion. About K&N Engineering K&N Engineering, of Riverside, California, is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. From humble beginnings as a family run business over 35 years ago, K&N Engineering, now a truly global company with offices in the UK and the Netherlands, continues to exist as a family owned business with an enthusiast mindset and a direct connection with motor sports that carries over throughout all levels of management and manufacturing. Note: Some FIPK's will not fit on vehicles with lift kits. Diesel pickup truck performance intakes for Power Stroke, Duramax and Cummins Engines are also available.

Brand: K&N


OEM Part Number: 57-9015-1


Global Trade Identification Number: 03


Shape: Oblong


Manufacturer: K&N Engineering


Brand: ‎K&N


OEM Part Number: ‎57-9015-1


Global Trade Identification Number: ‎03


Shape: ‎Oblong


Manufacturer: ‎K&N Engineering


Automotive Fit Type: ‎Vehicle Specific Fit


UPC: ‎024844095503


Model: ‎Performance Cold Air Intake


Item Weight: ‎8.38 pounds


Product Dimensions: ‎20 x 12 x 12 inches


Country of Origin: ‎USA


Item model number: ‎57-9015-1


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Machined


Manufacturer Part Number: ‎57-9015-1


Date First Available: February 1, 2006


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • More power
Style: 50 State Legal
The media could not be loaded. Easy to install, everything fit perfect. Definitely noticed a faster response when stepping on the gas. Also makes the engine sound more aggressive for being a 3.4L😅
Reviewed in the United States on January 21, 2025 by Amazon Customer Amazon Customer

  • FUN and it works
Style: 50 State Legal
Well, after a week of driving, I can now report on the installation and the so-far-results. It did take a bit longer then 90 minutes. I have a 2001 Toyota 4Runner and there was a need, like with others, to drill a large hole (1&3/8")in the intake pipe. Since the pipe is a ...pipe, using a large hole saw to drill on a curved pipe is a bit of a pain. I decided to use a straight drill bit of the largest diameter that I had and then use a knife then a file to make it the exact size I needed. After this is done, you then mount a large, round, flat rubber gasket to the pipe. After doing this I decided to seal around it with clear silicone sealant. After doing this I let it set while I took the old system off and readied the new to go on. It was fairly straight forward after that and rather fun. It does become a bit louder when you put your foot into it, but quite enough when driving normally. There is a definite increase in horsepower as felt and there IS an increase in MPG of about 10-13%. Not a great lot but every bit helps. I do recommend this item but remember, the menu on Amazon does not always produce the correct results. I checked with K&N when I got the first one ordered and it seemed to be wrong. They gave me the correct one model number. I then went back to Amazon and put both numbers (the one I ordered as well as the one K&N said I needed) and they both came back as the correct one for my application. To Amazons credit, they did a return for me as I ordered the new one. Amazon is the BEST !!! ... show more
Reviewed in the United States on April 4, 2011 by Homer Homer

  • Clean install
Style: 50 State Legal
Easy to install and maintain. Sounds cool at full throttle, gas mileage about 1 mpg better. Not much improvement on power.
Reviewed in the United States on December 26, 2013 by Consumer2

  • Improve HP, and Milage
Style: 50 State Legal
A bit above my pay grade, I'm not a Mechanic , I took my 4 Runner to my Mechanic to install the unit. Fits Great, feeling more HP and low end as well. waiting to see how my milage improves. I had to also replace my throttle positioning sensor and 02 sensors. The Idle is pretty high right now, will drive a distance today to reset the computer. ... show more
Reviewed in the United States on March 1, 2025 by ted

  • Kand N cold air intake
Style: 50 State Legal
Haven't noticed a boost of power but my truck really sounds great now
Reviewed in the United States on April 4, 2025 by Fred Flintstone

  • Worked great - 2 MPG increase and probably 15 RWHP (that's an estimate)
Style: 50 State Legal
Applied to 2000 4Runner. Went on with no alterations. Took a total of 20 minutes including phone interruptions. Gave me about 2 MPG improvement over longer trips. I bought this to improve my pulling capacity for a boat. This little truck did an okay job the year before but with the filter (which doesn't seem like much of a change) it really smoked the 400 mile trip. I like this filter and bought drop in versions for my other cars. ... show more
Reviewed in the United States on November 16, 2013 by Rob & Robin

  • DEFECTIVE -WORST CUSTOMER SERVICE.
Style: 50 State Legal
Would love to actually rate the product itself but received a defective pipe. Screw holes do not line up. Called customer service was told they would send a replacement asap. Needless to say never received anything. Another call to be told it has to go through “quality control”. Then 2 more additional calls as it has been almost 3 weeks and still awaiting quality control before it can be shipped! So after you spend 300$ on a product you expect to be good don’t expect K&N to move there feet when the send you a defective piece! Terrible customer service! Sent an email. Sent messages through social media. Called customer service. Still no go. ... show more
Reviewed in the United States on July 5, 2023 by J Dee J Dee

  • Good and Bad
Style: 50 State Legal
Rivet points for sensor did not align, had to cut out a good chunk to have it sit flat with no gaps. Mounting bracket came extra bent, had to bend back. Heat shield moulding came with a nice little tear on the bottom part. Besides all of this, the intake performs well. Upset at the quality, happy with the results. ... show more
Reviewed in the United States on March 25, 2025 by Lonnie

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