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K&N 57-2551 Air Intake

57 Series FIPK > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   2 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)
  • Easy to install, usually in 90 minutes or less
  • Free-flowing high density polyethylene tube
  • Replaces entire factory air intake system
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty
The K&N 57-2551 Air Intake fits some Lincoln Navigator models. See vehicle applications link for details.
The K&N 57-2551 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some Lincoln Navigator models. 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 57-2551 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 tube accommodates the factory mass air sensor, air temperature sensor and crank case vent hose. The oversized cone shaped 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 existing factory mounting points. The tools needed are a screwdriver, pliers, ratchet set and several wrenches. 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 Gain15.48 HP @ 5049 RPM
Replacement FilterRF-1020
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
Clamps Included6
Clamp MaterialStainless Steel
Clamp StyleRegular
CARB EO NumberD-269-28
Couplers Included2
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
Weight10.3 lb (4.7 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
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 57-2551 Air Intake Product Reviews

Friday, August 4, 2017 - Part 57-2551
I do a lot of driving and on the hwy driving 300-500 miles almost every week. Always wanted a cold air intake because I know a few friends that have it and told me about their experience with it. Soon as I installed it, which is very easy and simple, I noticed a huge difference in performance right away. I've told a few other friends about it and they see the difference, and they went and ordered a cold air intake also. I'm very satisfied with what I have and will never settle for anything less. Thanks

Gabriel Naughton
Wilmington, Missouri
Saturday, June 4, 2016 - Part 57-2551
I recently purchased a new K&N cold air intake and let me tell you, boy! What a great product the wonderful people at K&N put out. The sound difference alone when you fire up your vehicle is enough to make you wanna go get one, but jump on the throttle and I thought I was in a different truck. Thank you for your quality and craftsmanship to all the men and women at K&N. I am looking forward to buying one for my silverado next. Every bit what it's hyped up to be.