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I recently priced some basic mods for my brother's 4.6L stang. First things I would do is headers and exhaust, computer, MAF, and better filter. I have no idea if these cars need bigger injectors once you do those mods.</P>
Yep, gears, air-flow (but remember to go from the cats on back, cause if you don't you may void your warranty) -- find out first what will and will not void your warranty.</P>
but jeep and lloyd are pretty much on the money.</P>