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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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#5
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from my personal experience, headers don't really add alot of power to our trucks as much as the way it makes that power. mine for instance has alot "broader" torque curve than before which is what i was after.
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