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Since I can't search this forum at the moment, and I'm not getting great results from Google, what is this ZOODAD mod that I see people refer to? I have a 1999 F250 V10 4X4..
Okay try this, open the hood. Look at the air filter housing, there is a section that will go into the grill area (kinda sorta). Now look at the small section of the grill, the two areas interconnect. If you were to use a hole saw (IE to install a door ****) you can drill out that fiberglass area to increase airflow into that area. The orginator of this used the forum handle of " ZOODAD", hence the mods name.