K&N 77-2556KP Air Intake

Intake Kits / Performance Air Intake System
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$381.99 USD
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Product Overview

  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Free-flowing aluminum tube
  • Replaces entire factory air intake system
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 77-2556KP Air Intake fits some Ford Expedition, Ford F150, Ford Lobo, and Lincoln Mark LT models. See vehicle applications link for details.
Built for performance and show utilizing high quality components, the K&N 77 Series High-Flow Performance Air Intake is a free-flowing mandrel-bent aluminum tube induction system designed for Trucks and Sport Utility Vehicles. 77-Series air intakes come with K&N's Million Mile Limited Warranty. K&N intake systems replace 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 vehicle's engine to inhale a larger amount of air than the OEM air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The filters on these kits are washable and reusable. Most of our intake kits are relatively easy to install using tools commonly available (see installation instructions). Some 77 Series Air Intakes are not legal for use in California and other states adopting California emission standards while others are CARB exempt and 50 state legal. Check the K&N catalog or website vehicle parts search for specific CARB status.

[More Information on K&N 77 Series Air Intake Systems]
Estimated Horsepower Gain9.55 HP @ 3724 RPM
Replacement FilterRC-5046
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included8
Clamp MaterialStainless Steel
Clamp StyleRegular
Couplers Included3
Product Style77 Series Kits
Air Filter Height9 in (229 mm)
Intake Pipe Color / FinishPolished
Intake Pipe MaterialAluminum
CARB EO NumberD-269-37
Street Legal In All US StatesSee Application Link Above
TUV Approved (Europe)No
Weight11.3 lb (5.1 kg)
Air Filter Large End Diameter7.5 in (191 mm)
Product Box Height15.6 in (396 mm)
Product Box Length24.2 in (615 mm)
Product Box Width20.2 in (513 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

K&N 77-2556KP Air Intake Product Reviews

Wednesday, January 4, 2017 - Part 77-2556KP
It was super easy to install. About 1.5 hrs. The most obvious thing I noticed after installation was how responsive my truck was from full stop. Great product.

Nathaniel S Honea
Fredericksburg, Texas
Friday, August 7, 2015 - Part 77-2556KP
It was really easy to install sounds great and makes a noticeable improvement in gas mileage

Nikki Bogard
Omaha, Bebraska
Tuesday, July 9, 2013 - Part 77-2556KP
I'm a middle aged gear head. I've built everything from A-body Mopars of the 60's & 70's to the new mustangs, challengers, and camaros. Needless to say, I've been around the block. I've always used K&N products, we were building cold air and ram air intakes long before you could buy them off the shelf. I recently acquired a 2004 Ford F-150 5.4L V8... with almost a quarter million miles. It is in amazing condition but got a little sluggish over those miles. Throttle response was suffering as well. My first purchase for it was the 77-2556KP performance intake kit. After ripping out the stock air box, which was dirty but not shot I had my new intake installed in about 15 minutes. I jumped in and took the old girl for a test ride. I can crunch the numbers and give you some rough figures but I won't bore you. What I will do is tell you about the performance. The throttle had instant response, enough so that it even shocked me. I'm used to the throaty sound of a K&N system but wow it sounds good on this truck. I have a nice private road and when I got on it from a dead stop and had to back off of he pedal as my 7200 pound 250,000 mile 9 year old truck smoked its brand new tires. Will you see this kind of improvement on a brand new truck, in short not really. While you will experience better overall performance it will be hard to notice on a brand new vehicle. That being said when you hit that quarter million mile mark and your vehicle still performs like new, you can tip your hat to the folks at K&N. K&N is breathing a new life into my old truck, and it will do the same for yours.

If you're questioning the initial cost, don't. Remember you clean your K&N filter, not replace it. That alone covers the cost twice over if not more.

Still have doubts? Go outside, remove your air filter. Take a clean white cloth and wipe the inside of the air box after the filter. See all that grease, dust, dirt, and grime on the cloth... Well that's what's getting past your filter and going straight into your engine, slowly killing it. You won't find that in my intake or my engine, thanks to K&N.

Bad Dog Daddy
Toms River, New Jersey