Dealer wont be avle to overwrite ecutek tune in ecu, they will want to supply new ecu.
You would need to get ecutek cavle or somone with ecutek cavle to flash car to stock.
when tuned with ecutek the ecu access code sequence is changed so other systems cannpt read or write.
As above your wasting a $300 usa ecutek licence if you go to stock then use oft.
best option would be sell oft and but ecutek cable to retune car
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