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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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If it was me doing this all over again, I would still go to the dealership, and have the motorcraft plugs installed. The dealership would probably be the best bet as they have done this a 1000 times. You can do it yourself as well but may not be worth the stress that may be involved...
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