And to put some more perspective on things. Just changing out the filter for a "less restrictive" one has virtually no positive effects anyway.
If you REALLY want to improve the amount of air going into the engine there is a LOT of work to do. First you have to ensure that the entire inlet tract is completely smooth, no ridges, sharp corners, gaps, grooves etc. etc. Then you need to ensure where the air goes in, that you have a well design bellmouth/cone to ensure the air flow is laminar. Plus you need a big housing/chamber for the air to come into (read filter housing) to "slow down" allowing it to go as laminar as possible into the inlet tract. You can go even further and make quite some gain by "smoothing" the inlet tract. Make all surfaces super smooth to reduce turbulence along them.
I know of a racing team that used to outpower factory racing Porches with the standard filter housing on it but after doing a lot of work to get a perfectly smooth inlet tract (that plus some other tricks).
So bottomline, adding a "less restrictive" filter does little to no good, if you want any real gain, you have to do some real work! MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!
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