help with 2001 gt
i recently purchased a 2001 gt and am looking to add more horsepower and torque. i'm thinking of adding new gears first but which should i get? im thinking either 3.55 or 3.73. what kind of gas mileage will i be giving up with these puppies? what is a good brand to get? also could someone suggest some other relatively low cost upgrades to get more power. thanks.
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