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K&N 57 Series FIPK Air Intake (50-State Legal) Part #57-2538 Customer Reviews
12 Customer Reviews
Reviewed by Justin C (Fort Worth, TX) Reviewed for a 2004 Ford Expedition — Jul 14, 2015 5:12 AM
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.
Reviewed by Ross W (Mercedes, TX) Reviewed for a 2003 Ford Expedition — Nov 24, 2012 6:40 AM
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.
Reviewed by Robert W (LAKE MARY, FL) — Oct 23, 2012 8:45 AM
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.
Reviewed by Michael L (Glendale, AZ) Reviewed for a 2004 Ford Expedition — Nov 28, 2011 1:37 PM
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.
Reviewed by Armando N (Worland, WY) — Jun 14, 2011 9:37 PM
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.
Reviewed by Reginald P (San Antonio, TX) Reviewed for a 2004 Ford Expedition — Apr 19, 2011 4:40 PM
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.
Reviewed by j clifton m (Bozeman, MT) Reviewed for a 2003 Ford Expedition — Aug 16, 2010 9:10 PM
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.
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