Search  for anything...
K&N

K&N Cold Air Intake System: Dry-Flow Air Filter, Increase Performance & Towing: Compatible with 2004-2008 FORD/LINCOLN: Expedition, F150, Lobo, Mark LT, 71-2556

    • Based on 343 reviews
Condition: New
Checking for product changes
$399.99 Why this price?
Save $50.00 was $449.99

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 6 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, May 14
Order within 17 hours and 17 minutes
Available payment plans shown during checkout

Recently Viewed

Style: BlackHawk


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.
  • FEATURING K&Ns DRYFLOW, REUSABLE AIR FILTER: 2 layers of premium, pleated, synthetic media help block dirt and dust particles, allowing clean air to continue flowing into your engine, only needs cleaning every 50,000 miles under normal highway driving 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 Dry-Flow 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:2004-2008 FORD F LINCOLN Mark LT2004-2007 FORD Lobo2005 FORD Expedition

Brand: K&N


OEM Part Number: 71-2556


Global Trade Identification Number: 99


Shape: Oblong


Manufacturer: K&N Engineering


Brand: ‎K&N


OEM Part Number: ‎71-2556


Global Trade Identification Number: ‎99


Shape: ‎Oblong


Manufacturer: ‎K&N Engineering


Automotive Fit Type: ‎Vehicle Specific Fit


UPC: ‎024844335999


Model: ‎71-2556


Item Weight: ‎13.51 pounds


Country of Origin: ‎USA


Item model number: ‎71-2556


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Painted


Manufacturer Part Number: ‎71-2556


Date First Available: September 7, 2013


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 14

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Worth the buy
Style: Metal
Review Image by Amazon Customer Amazon Customer
This was an easy install, only took 1.5 hours. Some F150’s you’ll need a 1/8th drill bit to drill a hole for a mounting bracket, fortunately I already had the hole in mine. You do need some specialized tools but can ultimately get by without. Immediately noticed an increase to power and acceleration. It’s also considerably louder and sounds fantastic. Frees up alot of engine space and looks great. I’d consider this a must buy for the 5.4l Triton V8. I have a 2006 F150 Lariat Supercab 4x4 for reference. I’d also pay more and buy the metal version, I’ve heard stories of the plastic cracking after a couple of years. I’d also follow the K&N instructions and not youtube videos as alot of youtube videos are referencing the older model where you needed to remove the throttle body. This version you do not need to remove the throttle body. ... show more
Reviewed in the United States on August 12, 2024 by Amazon Customer Amazon Customer
    • K&N Cold Air Intake
Style: Air Intake System
Review Image by Ab Ab
Nice and easy time install took me about an hour but I'm a little burnt some of you can probably knock it out in about half hour if you half everything you need on hand to begin with. Was a great fit on my 2004 Ford F150 Lariat 5.4 I took it for a test drive definitely feels like it made a difference for sure sounded more aggressive and felt a little lighter on the acceleration ... show more
Reviewed in the United States on March 24, 2025 by Ab Ab
    • Amazing intake that delivers!
Style: Air Intake System
I would like to preface this review by noting that I did not install the piece myself but I had Express Oil do it. Even so, I still paid less for the part and installation than the prices that other websites offer the same filter. The worker said he had to glance at the installation guide once to see why they gave an extra cable but other than that he said it was pretty simple. I drive an F150 FX4 5.4. Liter. It already had an extremely loud exhaust on it. As soon as I left the parking lot with my new intake, I could tell a difference. Acceleration felt smoother, the exhaust sounded cleaner, and listening to the intake suck in air when you press the gas is awesome. I don't see that getting old any time soon. I'm not sure on gas mileage yet but I will be updating my review in a month or so when I can give more information. My girlfriend even noticed that my truck has a cleaner sound and feel to it. My idling exhaust is much smoother, but when I gun it, I'd swear its twice as loud and twice as fast. There seems to be a much better throttle response like others have noted. It used to be that there would be a delay from my foot smashing the gas pedal to the engine responding. Now, it's almost instantaneous. I highly recommend this product to any one. If you're still debating it, go for it! You've got nothing to loose and 15 hp to gain! I hope this review helps some people. ***will update on mpg as soon as possible. ... show more
Reviewed in the United States on September 20, 2013 by Steve
    • Awesome product!!
Style: Air Intake System
Awesome product. Fairly simple to install. Although if you're lacking in the mechanical ability such as I am it's good to have a friend who is a mechanic to help out. Took us about 2 hrs to install. The instructions and pictures were pretty easy to follow. tho it would have been better with a more detailed parts list versus just the pictures of the nuts and bolts. As far as the air intake itself i noticed an immediate increase in horsepower and take off power. I have only had it on a few weeks so I can't tell for sure if there is a noticeable increase in gas mileage. It does give my truck a slightly edgier sound on take off and idle. ... show more
Reviewed in the United States on March 12, 2013 by kevin
    • Just.another good K/N filter
Style: BlackHawk
I sought after this one because of it being all black and simple looking to install and boy was it the right move... looks and functions amazingly...bolted right up.throttle response is great, cant say touch on the MPG's I'm saving cause I swapped a fuel control module along with the intake, but it's just another good K/N. They could work on the price though... ... show more
Reviewed in the United States on December 31, 2024 by LoganMC
    • Pretty Much What Was Expected
Style: Air Intake System
Actually just installed this product yesterday on my 2004.5 F150 Lariat with 5.4 Triton. Whole process took about 1.5 hrs. or so. Instructions were pretty decent with two exceptions: 1) Was instructed to remove the overflow hose from radiator to overflow tank. Presumably because it would be too short or otherwise in the way. This required getting a bucket to catch liquid from top of radiator & about 7-8 min. to swap out. It turned out to be totally unneeded. The existing hose could have stayed exactly the way it was. In fact, the replacement hose is more in the way as it is not contoured to go around the filter/heat shield box as well as the existing one was. 2) After mounting the air tube/filter through the heat shield near the end of install, noticed that there was a large open gap around that tube. Didn't make sense as heat/dirt could easily get through & it seemed incomplete. So, I took the remaining piece of excess rubber "edge trim" (that goes on top/side of heat shield) & installed it around the inside edge of the round opening for the tube in the heat shield. Worked like a charm to seal that gap. Although, they don't tell you to do it, it totally makes sense. After install, took a long ride to check it out. There was a definite change with the throaty sound when accelerating & a slight kick in the responsiveness. After a second longer drive a bit later, the sound & acceleration improved a bit more. Perhaps the engine computer/mass air sensor had to adjust to the change - it seemed to run even better after the second drive. Hasn't been long enough to check on the mpg as yet. But, when I did the same installation on another car of mine, it did make roughly a 1.5 mpg increase. I'll say that it sure makes more room under the hood. And, it looks much better with all that excess plastic bulk removed. On a side note, some reviewers complained of a "whistling" noise from this unit. I have heard no such noise at all. Perhaps, their install was just a bit off. Or, maybe my closing that gap around the air tube makes a difference. Not sure but, mine sounds and performs great - just as it was advertised. Noticed that the only two negative reviews both had the same 2006 models and the same issues. Perhaps, that is not a coincidence. I also noticed that they both generally only give negative reviews...just sayin. Nonetheless, I would definitely recommend this to others for their Ford truck. UPDATE: Have checked gas mileage a couple of times after install on road trips. Have come to conclusion the FIPK added maybe 1-1.5 mpg at most. I think alot of people don't notice any increase or perhaps even a slight decrease in mpg as they keep "their foot in it" to hear the cool sound & experience the HP increase. Just an opinion - I am totally satisfied with the purchase. ... show more
Reviewed in the United States on December 10, 2012 by CatMeister

Can't find a product?

Find it on Amazon first, then paste the link below.