lol... You modify from the predator itself.. when you install a tune it asks if you would like to modify it before you flash it just follow the steps it provides its rather simple imo.
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AGP D44/DSP/Coolingmist Meth Addict
418whp/473wtq on pump and meth
Tuned By TDSAaron!! 
My Goal: 100+Mph in the 1/8 
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