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  1. 2011 - 2014 Mustang GT (S197 - 5th Gen - 5.0L)
    Changed plugs out on my recently purchased 2011 Mustang GT/CS. Put some common plugs in to check and see if it was a plug problem. Same issue on number 2&3, wet on number 2 and ashy on number 3. Put Ford plugs in and have the same problem. Have a boss 302 intake on top and not sure if it has a...
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