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stacking is da shizzzz

  1. What if i use both

    01-04.5 LB7 Duramax Powertrain
    Alright i have a two position efi live switch one stock and the other balls to the walls hot tune. If i have me efi live hot tune on will i benifit at all by also having my edge j/a turned up also. I heard it will advance timing to far but will i be commanding even more fuel than just with the...