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unless you have some form of system to read ecu then you cannot rearly tell if its tuned.
you need something that at a minimum will read the CVN or checksum value number from ECU and the calibration ID like ZA1JB01C
you can then compare the CVN of a stock rom with the same calid if it same as stock its stock if it not something has been changed in ecu.
then to work out what tune system it is your going to need some more tools.
if it reads with Tactrix/ecuflash or oft then its not a BRZedit tune or its and ecutek tune without racrom features added.
If it wont read with tactrix or oft then it likely its and brzedit or ecutek tune with racrom features.
then you need to try brzedit or ecutek system to see which one it is.
some catless headers have the second 02 sensor in a spacer tube and this can stop or delay the ecu working out its catless header
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