You can call sct and they can walk you through the steps; what program to get, how to get the program, and how to use it. You need to go to sct website and download "sct updated" this will put tune files onto your handheld tuner.
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2004 Mustang GT 5 Speed
Full Bolt Ons
12.1 @ 117.9 (1.7) in 1/4th
7.6 @ 92.1 (1.6) in 1/8th