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I need help....I have store credit to a speed shop for about 350 dollars since I returned an item I didn't need anymore. I want to buy a bigger throttle body for my 2004 GTO, but my car has has been tuned and I don't know if putting a bigger throttle body on it will affect my tune in anyway. Will I lose hp do to the way the car is setup or will my car gain hp. Any help would be great. Also what is the stock fuel injector size on an 2004 GTO.
Last edited by 04YJ-GTO : 11-10-2007 at 06:42 PM.
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