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Do some forum searches, guys - this has been discussed before. A K&N passes a lot more dust than a good paper filter.
Yes, a K&N is less restrictive. No argument there. However, I'd rather have CLEAN than a bit more air. My truck did not run one bit better with a K&N than it did with a Motorcraft or Wix paper filter or my Amsoil nanofilter. However, with the K&N, my intake tube got a LOT more dusty than it did with the paper filter or the nanofilter in there.
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2003 F150XL 4.2 short cab/bed 4x2 5 speed manual 3.55 LS
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