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2004 Ford Focus Air Filters - Custom Fit

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Latest Customer Reviews

K&N Air Filters Reviews


VW Touareg

Reviewed By Peter H (Santa Maria, CA) Reviewed for a 2004 Ford Focus —9/5/2007 9:36 PM

I put the filter in with some sealing grease; it fit in nicely. It's only been 40 miles; so far I may be getting a tad bit better mileage, maybe 2 or 3%. The Touareg is heavy and slow with a V6, so I don't know if hp increase will be too evident.

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Green Air Filters Reviews


2014 Focus SE

Reviewed By cornelio u (Mesa, AZ) Reviewed for a 2014 Ford Focus —9/12/2016 9:26 PM

Got the green filter in hopes of getting better Gass millage not for power as most do,i drive 70 miles round trip to work. I also modified my airbox by cutting 2/3rds of it and made an intake similar to the FS works for $100 bucks less. The green filter looks to be well made, on par with any K&N I have ever bought.The intake sound is much louder now vs stock, but in a nice deep way. Mpg test not done yet. Well see.

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aFe Air Filters Reviews


High workmanship, but a pain to fit

Reviewed By Arunabh C (CEDAR RAPIDS, IA) Reviewed for a 2007 Mercury Milan —6/20/2016 12:10 PM

The air filter has a solid build and inserting it added a growl to the sound of my engine. The problem with this filter was that due to it's better quality material used it is slightly thicker and not as bendable as the factory filter, this gives it a very tight fit in the air filter compartment and one has to struggle quite a bit to close the air filter compartment tightly

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