Fits the vehicle:
Ford Flex, 2009
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K&N
K&N Engineering, of Riverside, California, is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. From humble beginnings as a family run business over 35 years ago, K&N Engineering, now a truly global company with offices in the U.K. and the Netherlands, continues to exist as a family owned business with an enthusiast mindset and a direct connection with motor sports that carries over throughout all levels of management and manufacturing. Today, K&N exists as both the sales and brand leader for performance filters, and maintains a stocking catalogue of over 3,500 part numbers, including an extensive line of both factory replacement drop-in filters, FIPK (Fuel Injection Performance Kit) applications, and its line of innovative Performance Gold oil filters.
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Overall Rating: 
5 out of 5
Great Investment,
April 07, 2008
By Hudson from Michigan Center, Michigan
| Appearance: | | 5 out of 5 |
| Ease of Use/Installation: | | 5 out of 5 |
| Quality: | | 5 out of 5 |
| Performance: | | 5 out of 5 |
- Pros: Too many to list
- Cons: NONE
"I switched from the "other" filters that claim to do the same job as this filter or better, well, this one lives up to its name, I sure can tell a difference when I switched to it, will for sure keep using this filter, the air filter from K&N is kicka*# t"
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Overall Rating: 
5 out of 5
awsome investment for your car!,
January 21, 2008
By murr from Honeoye, New York
| Appearance: | | 5 out of 5 |
| Ease of Use/Installation: | | 5 out of 5 |
| Quality: | | 5 out of 5 |
| Performance: | | 5 out of 5 |
- Pros: trusted brand easy intallation and removal
- Cons: n/a
"the k and n oil filter is a part you can buy for your car that can be trusted i switched from a Fram oil filter to a k and n oil filter because k an n is all about performance and they know what is best for your car. i would highly suggest k and n for you"