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06 Gt Upgrades
Ok time for upgrades fact warranty gone and wife has given the ok ha! ha!. First what muffler is going to give best bang for the buck et horsepower etc? also which gear will give best et with 18 inch wheels and tires? car has the 5r55s auto trans in it. also what would be underdrive pulley gain in ets? What would be the best cold air kit to run with nitrous?thx
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