98 GTs put out 10-15 more horses stock than the 96-97 2 valves. I think it has to do with a slightly different intake and other small changes. Consider the 98's the interim between the first and second generation 4.6s. ;-)
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98 GT
Dyno-Max cat-back exhaust, 3.73 gears, Steeda shifter, Ford Motorsport Underdrive pullies, 87mm MAF and Roush cold air kit...
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