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57-2556
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K&N 57-2556 Air Intake

57 Series FIPK > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   52 Customer Reviews
  • Guaranteed to increase horsepower
  • 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
  • Free-flowing high density polyethylene tube
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-2556 Air Intake fits some Ford Expedition, Ford F150, and Lincoln Mark LT models. See vehicle applications link for details.
The K&N 57 Series FIPK 57-2556 air intake system replaces your vehicle’s restrictive factory air filter and air intake housing. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 57-2556 air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs into the previous air box space. Air is directed through an aerodynamically engineered intake tube into the engine’s throttle body for a guaranteed power gain. The oversized air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This air intake is relatively easy to install usually in 90 minutes or less using commonly available tools. K&N 57 Series FIPK's are street legal in all 50 US states and come with K&N's Million Mile Limited Warranty.

[More Information on K&N FIPK Air Intake Systems]

Product Specifications

Estimated Horsepower Gain15.46 HP @ 3829 RPM
Replacement FilterRF-1020
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included7
Clamp MaterialStainless Steel
Clamp StyleRegular
CARB EO NumberD-269-37
Couplers Included3
TypeGen II
Product Style57 Series FIPK
Air Filter Height8 in (203 mm)
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight14 lb (6.4 kg)
Air Filter Large End Diameter7.5 in (191 mm)
Product Box Height12.5 in (318 mm)
Product Box Length22.25 in (565 mm)
Product Box Width14.25 in (362 mm)
Mounting Hardware IncludedYes
Warranty1,000,000 Miles/10 Year
Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov

K&N 57-2556 Air Intake Product Reviews

Thursday, August 30, 2018 - Part 57-2556
The Performance Air Intake System delivers on more HP and better gas mileage for my 2004 F-150.  However my experience was not perfect. The parts delivered to me did not include the throttle body gasket. There is big note on the instructions that says - NOTE: FAILURE TO FOLLOW INSTALLATION INSTRUCTIONS AND NOT USING THE PROVIDED HARDWARE MAY DAMAGE THE INTAKE TUBE, THROTTLE BODY AND ENGINE. So I had to call customer service to get the throttle body gasket shipped to me. This was taken care of free of charge. BUT I had to install without the gasket and then tear down and re-install with the gasket. The intake tube mounting bracket threaded insert also broke free from the tube due to poor adhesive so I have to fix it. Good - product does as advertised (but this is table stakes), instructions and videos are great guides for the novice. Bad - missing parts (throttle body gasket, and spacers), mediocre workmanship in intake tube I probably should have paid more for premium parts.

Dan Worrell
Longmont, Colorado
Monday, January 8, 2018 - Part 57-2556
Easy to install. I am not a mechanic. But instructions were easy to follow. Took two hours from start to finish. What a difference Engine sounds aggressive. And the performnce of the product is awesome. Totally in love with my intake. Should be a stock item on every F series truck. 5⭐️⭐️⭐️⭐️⭐️

Myron Perreira
Kailua-kona, Hawaii
Tuesday, September 19, 2017 - Part 57-2556
The video instructions were great. The paper instructions were small and tough to read. All in all, it was a simple install.

Michael Finney
Golden, Colorado