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  1. What Upgrades Should I go for, 2003 Mustang GT

    4.6L Talk
    Hello, I have a 03 Mustang GT, I have several hp upgrades I would like to do before dropping forced induction in. My first one is going to be a K&N FIPK with a 70mm throttle body and plenum or should I go with a 75? Next its on to the full exhaust I was told for the best results go with long...
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