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  1. #1 Re: some small mods for my new grand prix 
    blueguy
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    Default 03-28-2011
    It shouldn't hurt your MPG's at all...a tune will HELP MPG's if anything.
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  2. #2 Re: some small mods for my new grand prix 
    honda237
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    Default 03-28-2011
    Quote Originally Posted by bluegtp91 View Post
    It shouldn't hurt your MPG's at all...a tune will HELP MPG's if anything.
    ok thanks, looks like i'm going to have to way the odds.
    Thanks you for your help, i think i atleast know what i'm going to do.
    I will probably still get the PCM, headers and hv3
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