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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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Just for the record I love my Gryphon. No real MPG savings but tons of fun
![]() Question: With the 87 custom performance tune how much is the average increase in horse power?
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2002 F150 Screw 5.4L K&N CAI, Gryphon Programmer, True Dual Magnaflow Exhaust |
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