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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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#2
Mon, April 26th, 2010, 10:03 AM
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The programmer will definitely be one of the best investments you've made for your truck. Any exhaust modification from the Y pipe where the two banks connect back is not going to have a significant enough change to worry about custom tuning. If you want better sound I would go for the cat back system.
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