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best tuner mail tune

  1. 2003 - 2004 SVT Mustang Cobra
    First of all, I don't know much about tuning, a thing or two. I don't who's the best tuner that could tune my car (Mail Order Tune)?that could possibly send me a tune that is Dead-on (correct A/F, correct timing, no detonation)<--- I don't know if that is impossible?:sweat: but that is one of...
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