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K&N 57 Series FIPK Air Intake (50-State Legal) Part #57-2538 Customer Reviews

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12 Customer Reviews

04 expedition

Reviewed by Raul g (SAN BENITO, TX) Reviewed for a 2004 Ford Expedition — Apr 01, 2016 8:10 AM

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Very happy with the k&n it did everything wht it says I'm very happy with it thanks k&n and auto anything too

K&N 57 Air Intake for 4.6L V8

Reviewed by Justin C (Fort Worth, TX) Reviewed for a 2004 Ford Expedition — Jul 14, 2015 5:12 AM

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This intake works really well on the Ford 4.6L V8. I installed with a throttle body spacer on a 2004 Ford Expedition. The Expedition is heavy. No doubt about it but with this combo you really feel the difference in power. Fuel economy is up to 20mpg on the highway. Ordered the Heart Throb exhaust kit but have not installed it yet. The 4.6L is a fun engine to add accessories to as it can really produce alot of power with the right upgrades.

Bring your tool box

Reviewed by Ross W (Mercedes, TX) Reviewed for a 2003 Ford Expedition — Nov 24, 2012 6:40 AM

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2 of 2 people found the following review helpful.

On the whole this was a simple install. I set up a table in the driveway beside my truck and laid out all the tools called for and the parts as needed. After the third trip to the house for yet another tool not specified I finally just grabbed the tool box and brought it out. The pics could be a little larger to give you a better view of what you are doing but all and all it was pretty easy. Took me about an hour.

Fit

Reviewed by Robert W (LAKE MARY, FL) — Oct 23, 2012 8:45 AM

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Air intake didn't align properly. Had to adjust the resenator connection as it was off by a couple inches. This was not a direct fit for the 4.6 L that it was suppose to fit.

2004 Ford Expedition with 5.4L

Reviewed by Michael L (Glendale, AZ) Reviewed for a 2004 Ford Expedition — Nov 28, 2011 1:37 PM

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2 of 2 people found the following review helpful.

The only problem with the kit is that the hose clamp for the support bracket is almost too small and very hard to get on. Also the CARB sticker does not stick very well. It has greatly improved the power output and hill pulling. I am not working the engine as hard as before on uphill drives. Much better than the Airaid kit I orginally ordered that did not match anything on my Expedition and would not mount properly. Looks like K&N has the kit figured out correctly for my year Airaid does not.

Performance Improvement

Reviewed by Armando N (Worland, WY) — Jun 14, 2011 9:37 PM

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Have not verified any impact on MPG yet, but additional power curve is evident. I live in a WY, and towing over the mountains shows a definite improvement. Where RPM stood at 2300-2400 previously, now running at 2000-2100.

Heavy Breather

Reviewed by Reginald P (San Antonio, TX) Reviewed for a 2004 Ford Expedition — Apr 19, 2011 4:40 PM

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0 of 1 people found the following review helpful.

I recently added 26" rims to my '04' Expedition and fuel mileage dropped to WTH?!! Plus, performance became sluggish. After adding the K&N FIPK Air Intake, I regained some pep back in engine performance. Can't really comment on mileage yet. I also just added a Taylor Helix throttle body spacer and in progress of purchasing a power programmer. Finally, an exhaust system upgrade will be in the future.

K&N Intake System for 2003 5.4L V8 Expedition

Reviewed by j clifton m (Bozeman, MT) Reviewed for a 2003 Ford Expedition — Aug 16, 2010 9:10 PM

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3 of 3 people found the following review helpful.

As in other reviews, the system takes about 90 minutes to install with the step-by-step instructions from K&N. Stay organized and focused and it's easy. I bought it to increase mileage and towing power pulling my 4,000lb trailer -- mostly wind resistance. I think it worked. It pulls up hills a little easier and the power increase in noticeable at RPMs above 3500. Hard to say about mileage. Probably helped, but not much. I wouldn't make that the drop-the-hammer reason for buying. I didn't find any increase in sound noted in other reviews.

03 Expedition

Reviewed by Joseph J (Jeanerette, LA) Reviewed for a 2003 Ford Expedition — Jul 06, 2010 2:34 PM

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1 of 3 people found the following review helpful.

The engine sound nice it has a quicker pick up but I haven't seen a MPG increase. Over all it's a great system.

2004 Ford Expedition, Eddie Bauer

Reviewed by Amanda L (Janesville, MN) — Jul 08, 2008 11:16 AM

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2 of 2 people found the following review helpful.

I noticed a gain in horsepower; however, no gain in MPG's even with all regular maintenance. I was hoping for a little increase in fuel ecomomy.

K&N 57 Series FIPK Air Intake (50-State Legal) - 57-2538

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Options

  • Style:
    FIPK Intake
  • Part #:
    57-2538
  • Estimated horsepower gain: 10.8 HP @ 4618 RPM
  • Download installation instructions (PDF)
  • Includes K&N filter # RF-1020
  • Compatible with filter wrap # RF-1020DK (not included)
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