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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#21
Fri, April 2nd, 2010, 12:35 AM
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I have a K&N drop in filter and I did notice a slight improvement after installing it. I'm sure that gain is from having a little bit less filtration. I dont really care about what advertisers say about that because I can look through my filter and make out objects. It is however still filtering quite well and greasy spots on the inside of the intake are dark but still pretty clean.
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