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K&N 57-2538 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   3 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 57-2538 Air Intake fits some Ford Expedition models. See vehicle applications link for details.
The K&N 57-2538 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some Ford Expedition 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 57-2538 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 sensors, air temperature sensor, idle air control vent hose 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 requiring commonly available tools to do the job. 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 Gain10.15 HP @ 4618 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
Weight11.6 lb (5.3 kg)
Air Filter Large End Diameter7.5 in (191 mm)
Product Box Height12.5 in (318 mm)
Product Box Length18.25 in (464 mm)
Product Box Width18.25 in (464 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 57-2538 Air Intake Product Reviews

Friday, August 18, 2017 - Part 57-2538
Install was relatively easy. Because hoseclamps are precicely sized, alignment of tubing and filter is critical. Noticable improvement in performance. Overall very satisfied.

Leonard Urrea
Santa Maria, California
Monday, November 21, 2016 - Part 57-2538
Exactly what was ordered at a good price and arrived sooner than expected. Installation instructions were solid and the truck is performing well. Thanks K&N.

Richard Dunn
La Mesa, California
Tuesday, November 4, 2014 - Part 57-2538
My 2004 Expedition loves this intake! ;Feels like I added a brand new engine. It pulls longer, and I can pass other cars easily. When it is in the middle of a power-band I can take it up to about 4.000 RPM as I am accelerating or passing and it is very sporty feeling. I used to drive sports cars and this gives me a little bit of that feeling. Gas mileage has not increased since I am now flooring it all the time. I think when you fist install it you need to drive harder so that the vehicles computers relearn your driving habits for shift points,etc. I have had it 2 weeks now and I plan on driving it easy now to see if the gas mileage has increased. I have to remind you, if you get this do what I did and get a brake check. I had ceramic pads and new rotors installed on schedule, and I timed it as such. You will drive faster with the intake so keep that in mind. I also run [brand] oil, [brand]plugs, and low resistance tires. I normally avg 15.2 city, lots of red lights.