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  1. V

    5.4L 4v Navi swap N/A numbers??? any one know!!!

    i am interested in 5.4L 4v Navigator swap with sullivan intake in a 99 GT any one know of N/A numbers a setup like this produces my guess will be around 350-375HP and around 400ftlb off the crank i would love to see some ones dyno N/A of a setup with this intake. also what would be better to...
  2. V

    Higher flow fuel pump...need tune?

    Hi, I replace the stock 99 gt pump with an airtex unit that flows more Gallons Per Hour: 65-75 Pressure Rating: 100-120 psi dose this affect my air fuel ratio, do i need a tune.