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K&N

K&N Cold Air Intake System: High-Flow Air Filter, Increase Performance & Towing: Compatible with 1994-1997 FORD: F250, F350, 57-2531

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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Sep 9
Order within 23 hours and 13 minutes
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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:1994-1997 FORD F FORD F350 Designed to provide increased horsepower, the K&N 57-2531 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 57-2531 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( 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 57-2531 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 57-2531 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 57-2531 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 (9.79 hp @ 3,022 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 57-2531 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


Product Dimensions: 20"L x 12"W x 12"H


OEM Part Number: 57-2531


Global Trade Identification Number: 92


Shape: Round


Brand: ‎K&N


Product Dimensions: ‎20"L x 12"W x 12"H


OEM Part Number: ‎57-2531


Global Trade Identification Number: ‎92


Shape: ‎Round


Manufacturer: ‎K&N Engineering


Automotive Fit Type: ‎Vehicle Specific Fit


UPC: ‎024844100092


Model: ‎Cold Air Intake Kit


Item Weight: ‎14.56 pounds


Country of Origin: ‎USA


Item model number: ‎57-2531


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Painted


Manufacturer Part Number: ‎57-2531


Date First Available: October 10, 2005


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 9

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


  • Good directions for an easy install!
I just installed the intake last night and I'm very happy with it. The directions were very thorough and easy to follow. I was a little surprised how thorough this kit is. They thought of everything for a really clean and solid installation in these old trucks. In almost every vehicle I've owned, where I've used a washable K&N filter, I've averaged about a 2 MPG improvement. I'm sure this cold air intake will be the same or better. They even send their Dyno testing results with the kit. Pretty cool. Update! I can feel the difference! It's not a kick in the pants or anything, but it woke this old work truck up! I feel the torque increase going up hills- I don't have to down shift quite as soon. And this is the first time I've heard my turbo, lol. Happy with the purchase. ... show more
Reviewed in the United States on February 3, 2024 by KSL

  • Easy Install, Replaces Stock airbox seamlessly
Product comes with everything you need and instructions. It just works. The only issue I see is that the directions are not intuitive at times and you need just a small bit of mechanical exp and some patience to get everything just right. Otherwise, it's plug and play. Good flow, nice turbo sound, a bit more snappy throttle response, and good fit and finish. ... show more
Reviewed in the United States on October 29, 2024 by John H.

  • Good product
Installed 1996 f350 working great
Reviewed in the United States on July 6, 2025 by Amazon Customer

  • Good product
Easy to install, and cleans up the engine bay. Don’t know about performance… maybe a little better throttle response.
Reviewed in the United States on October 30, 2023 by facezx10r

  • Wow!
My truck is a '96 F250 with 270,000 miles on it. I would never have thought to buy one of these K&N filters, except that the air filter cover on my truck fell to pieces, and Ford doesn't sell the replacement parts anymore. The filter was very easy to install, and the improvement in my truck's performance was immediately obvious. It revs up more quickly and pulls more strongly. I even get better fuel mileage. I don't know why Ford didn't do a better job of getting enough air to their great 7.3 diesel, but they didn't, and K&N did. I wish I had gotten one for my truck many years ago, and it is the best thing I ever bought for it, for the money. ... show more
Reviewed in the United States on July 16, 2013 by Forrest W. Davis

  • K@N 57-2531 Air Filter
My old filter housing was also cracked, and I have been wanting this set up almost, since my 1997 F-350 was new. WOW what a diferance this set has made. I live in the mountains 8,500 feet. Smoke from my tail pipe when pulling is almost gone, I can actualy here the turbo winding, and I do feel the engine is working much better. I should have bought this in 1997. Seller was very prompt, instructions were flawless. It took about an hour to install. ... show more
Reviewed in the United States on November 5, 2011 by Kenneth Webb

  • Better air flow
Helped gain another 2-3 mpg on my 1997 F-250 7.3l.... a bit more pep, but this is just a start in the mods I have planned.
Reviewed in the United States on January 2, 2020 by James Phillips

  • Great "turn key" product!
In my particular vehicle I did not notice a huge amount of increase in hp. I purchased this item as a relatively inexpensive and simple fix to a botched cold air intake job. This product comes with everything you need for a respectable, neat and clean air flow system. From start to finish it took me an hour to install. I recommend cleaning your engine compartment (taking appropriate safeguards off course) and assembling the air box prior to "getting under the hood". Overall a great "turn key" product!!! ... show more
Reviewed in the United States on July 8, 2014 by C youngblood

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