picked up a Diablosport programmer about 3 yrs ago and Im glad that I did. It actually helped me quite a bit troubleshooting some problems that i had (a/c problems, lean codes,etc. ) and with some of the mods I have mostly external (coldair induction, xpipe, Vararam pwr dct, etc.) the Diablosport tune has probably added about 20-25hp. If you look at some of the forum sights, maybe you can get one for your year Z for less than the $350 that I paid. You cant get burned here as long as you know your limitations with it.
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