Backup/copy the stock PCM tune (.drg) file format with DS handheld plugged it into OBDII port (select vehicle : 6.4L SRT8 (don’t worry it doesn’t matter that it is not a Hellcat) and then tell it to install “93 OCT performance tune” or anything from the performance menu - NOTE: it will not install this tune onto your PCM, as that’s not what you want anyways, but it will copy/backup the original OEM tune from the PCM, once it's done, you can exit back to main menu and unplug handheld), transfer tune to your computer with DSdownloader by clicking “get tune from tool” button (bottom tab menu > express tune mode), make sure you remember name & save this tune somewhere on laptop (best to copy this file again and save as back up somewhere else like on a usb flash drive). Prework: (Based on DiabloSport).install unlocked PCM ( you tube video), ensure you have & appropriate usb drivers for your laptop & latest DSdownloader & DSdataviewer software (uninstall older version of both if you have them before you install new ones) with DSdownloader program open you can update the tool (bottom tab > express tune mode > 'Update tool' button) to latest (DCX_gas.CROM) is on DS handheld. Mods: Metco 2.85' pulley, DS unlocked PCM, DS Trinity T1000, HHP/Hemituner Custom Tune, Procharger crank pin kit and new crank bolt, DSS AL DS, AFe Intake, 180 tstat, Nitto 305/35R20 - 555R's

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