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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s |
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2003 F-150 Heritage.
So i have a 03 Heritage, 5.4 4r70w 4x4. AFE stage 2 intake and magnaflow cat back exhaust.
I have been contemplating upgrading to a larger throttle body and a lightning MAF with the custom tunes will this lead to more usable HP from these 3 combined mods? also will I need custom tuning for longtube headers? AND If I go longtubes into a single 3 inch Y will I belimiting horsepower production in the future? goal is to have a 14.5 second truck in the 1/4 mile. thanks for your inputs |
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