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Thread: Duramax Timing Calculator if anyone needs it

  1. #1

    Duramax Timing Calculator if anyone needs it

    Refer to the forum sticky and 20/20 tune tutorial on how to use it. Pretty straight forward though. Sounds like minimal of us using HPT to tune their dmax on our own but it does seem to work quite well. Take care everybody
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    2006 GTO 403ci lsa heads kooks long tubes corsa ss exhaust OTR intake HPTuned

    2010 GMC Sierra LMM Duramax. Exhaust and tuned