Here is the run down of SCT devices.
SCT X3 will only hold 3 custom tunes.
SCT SF3 will hold canned tunes and 3 custom tunes.
SCT TSX will hold canned tunes and 3 custom tunes.
SCT iTSX will hold canned tunes and 10 custom tunes.
SCT Livewire will hold canned tunes and 3 custom tunes.
SCT Livewire TS will hold canned tunes and 10 custom tunes.
Then there is the SCT 3015ID sold by Innovative diesel, in holds 5 basic custom tunes written by Innovative diesel and can hold 3 more custom tunes of your choice.
Any of these that hold custom tunes can be mixed/matched. Which means you can program the device to hold custom tunes from different tune writers. Example: currently I have Vivian's tow/agg tune, Eric's extreme race, and Matt's SRL++ on my SCT device.
If you thought about buying a used SCT device, be sure it's unlocked, and has unlocks left. You can find more info on buying a used SCT on this link.
What to look for when buying used SCT for 6.0
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2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB