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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#29
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I have an 02 4.6L and did notice some power gain but it could be because i also have a flowmaster cat back which allows a little better flow. The gryphon will tune your truck for the extra air amount coming in so it can put in more gas, more air+more gas= more fun
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