|Item Weight||14 pounds|
|Product Dimensions||18 x 18 x 12 inches|
|Item model number||57-2556|
|Manufacturer Part Number||57-2556|
|OEM Part Number||57-2556|
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K&N Performance Cold Air Intake Kit 57-2556 with Lifetime Filter for ford Expedition/F150, Lincoln Mark LT 5.4L V8
|Price:||$285.99 & FREE Shipping. Details|
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- Estimated horsepower gain of 15.46 HP at 3829 RPM
- Designed to improve throttle response and engine sound
- Lasts up to 100,000 miles before service is required (depending on driving conditions)
- Replaces entire factory air intake system
- Easy to install, usually in 90 minutes or less
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From the Manufacturer
Performance Air Intake Systems
How does a K&N High Flow Intake System 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. This begins with an oversized conical high-flow air filter. This larger filter fits into the engine compartment using factory holes and mounting points because it replaces your stock intake tube, and air box. This provides more airflow at lower restriction than a standard filter. 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 an intake tube that reduces turbulence and accelerates airflow into the engine. 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.
K&N Performance Air Intake Systems - Bolt on Horsepower
Guaranteed to Increase Horsepower
K&N is clearly the defined leader in high quality performance cold air intake systems for car and trucks. We feel it is one of the best dollars to horsepower investments you can make for your vehicle. Our first air intake kit was built in 1992. K&N manufactures over 500 different part numbers and our team of engineers are constantly designing, building and testing new air intake systems.
Oversized Washable High-Flow Air Filter
K&N starts with the largest conical shaped high-flow air filter that fits into the engine compartment using factory holes and mounting points. This extra filter size provides even more airflow at lower restriction than a standard K&N O/E replacement filter that is limited to the size of the factory air box. The oversized air filter also captures and holds more dirt increasing the service life before a cleaning is required (up to 100,000 miles).
10-Year/Million Mile Limited Warranty
K&N invented the world's first air filter that is guaranteed for one million miles. That same great warranty applies to K&N high-flow air intake systems. K&N performance products are well engineered, built with the finest materials and K&N stands behind them 100%.
Easy to Install with Basic Hand Tools
K&N air intakes are very easy to install on your car or truck. A typical air intake installation can be done with a screwdriver, pliers and a ratchet-set in 90 minutes or less! K&N specifically engineers their intake kits to use existing factory holes and mounting points, making installation simple. The vast majority of K&N cold air induction systems do not require any cutting or drilling.
Also available: K&N Cabin Air Filters
The K&N Washable Cabin Air Filter is the first of its kind designed to replace your vehicle's stock cabin air filter with a washable and reusable version that cleans and freshens incoming air. K&N Cabin Air Filters are designed to be cleaned and reused over and over again. Using a combination of an advanced synthetic filter media and K&N Refresher spray, the K&N Washable Cabin Air Filter grabs and holds dust particles.
Cabin Air Filters
Replacement Air Filters
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Top Customer Reviews
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.Read more ›
Pros: Very easy to install, you can truly feel a horsepower improvement, helps to improve throttle response, great written instructions with step by step photos, fantastic step by step video instructions on K&N's website, only 90 min install, top notch customer service, you get to remove 15lbs of complicated plastic and replaced it with 3lbs of simple straight pipe tubing and a ginormous filter, vortex sound when you accelerate hard (personal preference), military discount if ordered direct from K&N
Cons: Pricey for some plastic tubing and a big air filter... but still worth it, pay close attention to the bolt diagram, it can be easy to mix up which bolts go where and it doesn't help that they give you extra hardware (the extra hardware is needed for some of the ½ year models)
K&N Does NOT make ANY claims to improved gas mileage.
While you have the throttle body off it's a good idea to clean it (if needed) with some carb cleaner. Carbon tends to build up around the edge of the butterfly valve and can degrade throttle response and cause the computer to make your truck run rich at idle. It only takes two minutes and you've already done the hard work by removing the throttle body... just a thought.
Gumout 800002231 Carb and Choke Cleaner Jet Spray - 14 oz.
Install easy,dont remove the radiator overflow hose. Also, put the extra cutoff trim around the guard hole.
Fuel mlg before around town before install 11.6 after install 11.6
towing 8 after install 8
Growl intake sound <1/2 throttle not noticeable
Loud v8 intake growl making it feel like you have 500 extra HP. (in reality i cant tell a difference)
Pushing the truck up a hill under WOT towing, 8000 lbs 20 miles up I-8 from sea level to 5500ft - priceless..
The sound makes the 2005 f150 feel faster and more powerful. I dont know if it is.
Most Recent Customer Reviews
bolted in on factory mounts no hassle sounds goods seems to pick up some upon step on the gas lets see what it does on mileage a little high on the price BOYS AND TOYSPublished 3 days ago by 2013 CUSTOM HD
Easy to install and I love the ROAR of the intake. Still waiting for the MPG increasePublished 3 days ago by eric moyer
Cheap knock off parts labeled to look like k&n but obviously not. The parts were incomplete and not even compatable with my truck.Published 1 month ago by Amazon Customer
Gained approximately 2 mpg and significant increase in power and throttle response after about a tank of gas and resetting the battery upon installation. Read morePublished 2 months ago by Kevin McGowen
I love the K&N filter for my Ford F150 FX4 it made a huge difference and performance and I love the new sound it has!!!Published 4 months ago by Amazon Customer
I bought this for my 2006 F150 with a 5.4L engine. It arrived on time, fit perfectly and works perfectly. Read morePublished 4 months ago by Stewart