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K&N

K&N Cold Air Intake System: High-Flow Air Filter, Increase Performance & Towing: Compatible with 2004-2008 FORD/LINCOLN: Expedition, F150, Lobo, Mark LT, 77-2556KP

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Availability: Only 2 left in stock, order soon!
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Arrives Tuesday, May 13
Order within 19 hours and 38 minutes
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Style: Metal


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:2004-2008 FORD F LINCOLN Mark LT2004-2007 FORD Lobo2005 FORD Expedition Designed to provide increased horsepower, the K&N 77-2556KP Performance Air Intake Kit is a quick solution for truck and SUV owners who are looking for both an increase in reliable power and stylish design. Street legal in most states, easy to install and built around K&N's High-Flow technology, which utilizes a special oversized and washable cotton gauze air filter and a polished aluminum intake, the 77-2556KP drives a massive amount of air into an engine, which translates into power affordable on most automotive budgets. .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 77-2556KP 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 77-2556KP 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 77-2556KP 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), and is 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 mandrel-bent polished aluminum tube induction system designed for trucks and sport utility vehicles (SUVs). 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. Use K&N's search by part to see which cold air intakes are CARB exempt for which vehicles. Key Features: Guaranteed to provide increased horsepower and acceleration (9.53 hp @ 3,725 rpm measured by manufacturer).Engineered to specific vehicle design. See vehicle search above for compatibility.Easy to install and lasts up to 100,000 miles before service is required, depending on driving conditions.Street legal in most states (check part number or vehicle listing for specific CARB status).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 77-2556KP Performance Air Intake 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.

Brand: K&N


OEM Part Number: 77-2556KP


Global Trade Identification Number: 04


Manufacturer: K&N


Automotive Fit Type: Vehicle Specific Fit


Brand: ‎K&N


OEM Part Number: ‎77-2556KP


Global Trade Identification Number: ‎04


Manufacturer: ‎K&N


Automotive Fit Type: ‎Vehicle Specific Fit


UPC: ‎024844112804


Model: ‎Performance Air Intake System


Item Weight: ‎11.26 pounds


Product Dimensions: ‎18 x 18 x 12 inches


Country of Origin: ‎USA


Item model number: ‎77-2556KP


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Machined


Manufacturer Part Number: ‎77-2556KP


Date First Available: January 10, 2006


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 13

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


  • Worth the buy
Style: Metal
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
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

  • Good flow, sound, looks, some minor quality issues
Style: Air Intake System
Good flow design, great sound, cleans up engine bay nice. Can recommend overall. Was a bit disappointed in the install, had to actually drill out a guide hole on the MAF bracket because they didn't line up. Expected more precision from a brand like K&N. Small frustrations but overall worth it IMO.
Reviewed in the United States on April 8, 2025 by Faith Faith

  • 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

  • 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

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