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K&N 57-2538 5.0 out of 5 stars 1 Customer Review
57 Series FIPK > Performance Intake Kit

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57-2538
 
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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 FIPK Air Intake Systems]
  • 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
Available Information
Installation Instruction Sheet
57-2538 Vehicle Applications
Dyno Chart - 2003 Ford Expedition 4.6L - 10.15HP Increase
News Story - Performance Parts for the Ford Expedition Add Power & Protection


Part 57-2538 Product Specifications
Product Style: 57 Series FIPK
Estimated Horsepower Gain: 10.15 HP @ 4618 RPM
Replacement Filter: RF-1020
Air Filter Color: Red
Air Filter Outlet Shape: Round
Street Legal In All US States: Yes
Air Filter Height: 8 in (203 mm)
TUV Approved (Europe): No
Air Filter Material: Cotton Gauze
Clamps Included: 6
Clamp Material: Stainless Steel
Clamp Style: Regular
Couplers Included: 3
Type: Gen II
Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
Intake Pipe Color / Finish: Black
Intake Pipe Ports: All intake tube ports needed for the specified applications are included
Vacuum Tubing Included: No
Air Filter Large End Diameter: 7.5 in (191 mm)
Weight: 11.6 lb (5.3 kg)
Product Box Length: 18.25 in (464 mm)
Product Box Width: 18.25 in (464 mm)
Product Box Height: 12.5 in (318 mm)


Horsepower gains based on similar vehicle dynamometer test. Results will vary.


Product Reviews      Review 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.
AJ, Florida